1.No, they didn't wear uniform at school
2.No, she hasn't baked a cake
3.No, he won't buy a DVD player
4.No, teacher doesn't explain the passive voice
5.No, they don't hug me
6.No, she didn't learn English
7.No, they hadn't crossed the bridge
8.No, they couldn't see the match
все местоимения можешь заменить словами из предложений
в 7-ом я не уверен в ответе т.к. я с этим временем дела не имел