根据所给单词写出正确形式

1. Where can we buy these ________(watch)?

2. He often ________(listen) to BBC in the morning.

3. Andy                  ________(not do) her homework sometimes.

4. I want to _________(buy)s new T-shirt.

5. Everyone _________(be) in the classroom.

6. How does she _________(do)it?

7. There is a _________(swim)pool in our school.

8. Would you like to go with ________(I) after school?

9. His father looks at his son ________(happy).

10. Don’t forget to come to ________(Millie) party.

5-氟尿嘧啶的结构与尿嘧啶很相似，是利用（）将尿嘧啶的氢用氟取代而得。

A.前药原理

B.生物电子等排原理

C.同系物原理

D.软药原理