Сделайте пожалуйстаFill in the gaps with the right form of the

Сделайте пожалуйста

Fill in the gaps with the right form of the verb:
Use: was able, have to, shouldn't, will be able, couldn't, could, can't
1) When I looked at the test, I answer many questions.
2) My camera doesn't work, so I take any pictures.
3) If I learn English, I to understand people abroad.
4) The singer had a sore throat However, she to sing at the concert.
5) He sing very well when he was twenty.
6) You eat a lot of sweets.
7) They didn't go to school last week.