Сделайте пожалуйста✋ Fill in the gaps with the right form of the verb: Use: was able,...

Question

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.

Answer 1

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