Practise部分答案
(仅供参考)
右上图:A:Did he watch TV yesterday?
B:Yes,he did.
He watched TV yesterday.
左下图:A:Did she do her homework yesterday?
B:Yes,she did.
She did her homework yesterday.
右下图:A:Did he go to the zoo yesterday?
B:No, he didn't.
He didn't go to the zoo yesterday.