有这样一个两位数，个位上的数字和十位上的数字之和等于10。你知道这样的两位数有多少个吗?分别是多少?

① What will your dad do next week? ____     A. He is a doctor.

② Why do you like summer? ____     B. It is green.

③ What does he do? ____     C. I can see thirteen.

④ Did you have a good time? ____     D. Because I can swim.

⑤ When did you come home?____     E. We’re going to visit the art museum.

⑥ What colour is it?  ____     F. Yes, I enjoyed myself very much.

⑦ What are you going to do tomorrow? ____     G. I did my homework.

⑧ How many cows can you see?  ____     H. At about eleven in the evening.

⑨ What’s Mary doing now?  ____     I. She’s sleeping in bed. She’s ill.

⑩ What did you do last night?   ____     J. He’ll go fishing.