Ответ:

2.You were abroad last year

You weren't abroad last year

Were you abroad last year?

3.The pupil was in the library last March

The pupil wasn't in the library last March

Was the pupil in the library last March?

4.They were at the seaside last April

The weren't at the seaside last April

Were they at the seaside last April?

5.Your friend was at the party last July

Your friend wasn't at the party last July

Was your friend at the party last July?