The sentence refers to a completed action in the past ("yesterday"). The simple past "did not come" is correct. "Has not come" is present perfect, which does not work with a specific past time like "yesterday."

For two-item comparisons, use the comparative form: "more efficient" (efficient has three syllables, so "more + adjective"). "Efficienter" is incorrect. "Most efficient" is superlative (three or more items).

Future perfect tense ("will have finished") describes an action that will be completed before another future action. The arrival is in the future; finishing dinner happens before that arrival.

Indirect questions use statement word order (subject + verb), not question order. "Where the station is" is correct. "Where is the station" is direct question word order, which is incorrect after "Could you tell me."

The adverb "clearly" modifies the verb "speaks." "Clear" is an adjective and cannot modify a verb. "Clearly" describes how she speaks.

After phrasal verbs like "look forward to," the "to" is a preposition, not part of an infinitive. Therefore, use the gerund (-ing form). "Hearing" is correct. "Hear" (infinitive) is incorrect after a preposition.

The present perfect continuous ("have been working") emphasizes the duration of an action that started in the past and continues to the present. "For 10 years" indicates duration, so the continuous form is appropriate.

The structure "so + adjective + that" expresses a result. "So boring that" means the level of boredom caused falling asleep. "Such" is used with noun phrases ("such a boring movie that").

When "not only" begins a sentence for emphasis, subject-verb inversion is required. "Did she pass" is correct. "She passed" (no inversion) is incorrect in this structure.

The adjective "responsible" is followed by the preposition "for" + gerund (or noun). "For preparing" is correct. "To prepare" (infinitive) is incorrect with "responsible."

This is an inverted third conditional (past unreal condition). "Had I known" = "If I had known." The result clause requires "would have taken." "Would take" is for present/future unreal.

After the causative verb "made" (meaning forced/compelled), use the bare infinitive (no "to"). "Work" is correct. "To work" is used after "forced" or "asked" but not after "made."

The correct verb form for third person singular in the present tense is "goes".

The present continuous tense requires the verb ending in "-ing".

The article "an" is used before words beginning with a vowel sound.

The sentence refers to the past, so the correct verb is "watched".

The comparative form of "interesting" is "more interesting".

After the modal verb "can", the base form of the verb is used.

The correct preposition for position below a table is "under".

In the first conditional, the main clause uses "will" plus the base verb.

The preposition "since" is used with a specific point in time.

"Many" is used with countable plural nouns such as apples.

The adjective "interested" is followed by the preposition "in".

The future perfect tense uses "will have" plus the past participle.

The correct answer is "Submit". The verb submit means to hand in or turn in an assignment for evaluation.

The correct answer is "Take". The natural collocation is take part, meaning to participate or be involved in an activity.

The correct answer is "Experiment". A scientific experiment is conducted to test a hypothesis.

The correct answer is "Pay". The natural collocation is pay attention, meaning to focus and listen carefully.

The correct answer is "Introduce". Introduce new technology means to bring it into use for the first time.

The correct answer is "Do". The natural collocation is do exercise, meaning to engage in physical activity.

The correct answer is "Collect". Collect accurate data means to gather information systematically.

The correct answer is "Valuable". Valuable information means extremely useful or important information.

The correct answer is "Expand". Expand vocabulary means to increase the range of words one knows.

The correct answer is "Complete". Complete the missing words means to fill in the blanks.

The correct answer is "Meet". Meet deadlines means to finish work by the required time.

The correct answer is "Develop". Develop solutions means to create or devise ways to solve problems.

The correct answer is "submit". The sentence is a command or request in imperative form, so the base verb submit is correct.

The correct answer is "schedule". The infinitive form to schedule is needed after need to. The base verb schedule is correct.

The correct answer is "for". The correct preposition after responsible is for. She is responsible for the project.

The correct answer is "to revise". The verb ask is followed by an infinitive: asked him to revise.

The correct answer is "had started". This is a third conditional sentence: if plus past perfect had started, then would have finished.

The correct answer is "was completed". The phrase yesterday indicates past time, and the passive voice requires was plus the past participle completed.

The correct answer is "is". In time clauses with as soon as, the present simple tense is used to refer to the future.

The correct answer is "meeting". Look forward to is always followed by a gerund the ing form of the verb.

The correct answer is "increased". The present perfect tense has plus past participle is used here. Increased is the past participle of increase.

The correct answer is "had". The past perfect tense had plus past participle is used for an action completed before another past action already started.

The correct answer is "carry". The modal verb must is followed by the base form of the verb.

The correct answer is "has been". The phrase since 2020 indicates a duration from the past until now, requiring the present perfect tense.

The correct answer is "contact". The sentence is a polite request using the imperative form, so the base verb contact is correct.

The correct answer is "reviewed". After need to be, the past participle reviewed is used to form the passive infinitive.

The correct answer is "reviewing". The verb suggest is followed by a gerund the ing form.

The correct answer is "managing". After the preposition for, the gerund managing is required.

The correct answer is "because". Because introduces the reason for the meeting being canceled.

The correct answer is "by". By Friday indicates that the project will be finished at or before that time.

The correct answer is "will". This is a first conditional sentence: if plus present simple increase, then will plus base verb hire.

The correct answer is "had finished". In reported speech, the past perfect tense had finished is used after asked if when the original question was in the past.