The correct answer is "went". The sentence describes a completed action in the past yesterday, so the past tense went is correct.

The correct answer is "finished". The present perfect tense have plus past participle is used here. Finished is the past participle of finish.

The correct answer is "reading". The word now indicates an action happening at the present moment, so the present continuous tense is correct.

The correct answer is "were having". The past continuous is used for an action that was in progress when another action the phone rang interrupted it.

The correct answer is "were". In second conditional sentences expressing unreal situations, were is used for all persons with if.

The correct answer is "since". Since is used with a specific point in time 2015, not a duration.

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

The correct answer is "went". The phrase last year indicates a completed past action, so the past tense went is correct.

The correct answer is "are". The word now indicates an action happening at the present moment, and the subject they is plural, so are is correct.

The correct answer is "has". The subject she is third person singular, so the auxiliary verb has is correct for the present perfect tense.

The correct answer is "are going". The word tomorrow indicates a future plan, and are going to go is shortened to are going in informal English.

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

The correct answer is "lost". The word yesterday indicates a completed past action, so the past tense lost is correct.

The correct answer is "have". The subject I takes have, not has, for the present perfect tense.

The correct answer is "has". The present perfect with already uses has for third person singular subject he.

The correct answer is "were watching". The past continuous is used for an action that was in progress when another action when I arrived occurred.

The correct answer is "would". This is a second conditional sentence if plus past simple, then would plus base verb.

The correct answer is "listening to". The verb enjoy is followed by a gerund, and listen requires the preposition to.

The correct answer is "have". The subject we takes have for the present perfect tense with already.

The correct answer is "goes". The phrase every day indicates a habitual action, and the subject he is third person singular, so goes is correct.