题目：
用括号内动词的适当形式填空。
1. Mary _____________ (cook) nice food for her family now.
2. Look! It _____________ (snow) now.
3. We _____________ (write) a book this month.
4. It _____________ (get) dark. Let's go home.
5. My father _____________ (play) chess with my uncle now.
6. Mary _____________ (come) soon.
7. Listen! The mouse _____________ (eat) candies.
8. Excuse me, why are you _____________ (cry)? I lost my book.
9. I'm sorry! You can't come in Dad _____________ (sleep).
10. It _____________ (rain) outside. Please close the window!
11. Listen, the telephone _____________ (ring).
12. What _____________ the boy _____________ (do) on the road? He _____________ (ride) a bike.
13. The birds _____________ (fly) over the sea.
14. The bananas (get) ripe.
15. Look. He _____________ (dance) beautifully.
答案：
1. is cooking 2. is snowing 3. are writing 4. is getting 5. is playing 6. is coming 7. is eating 8. crying
9. is sleeping 10. is raining 11. is ringing 12. is, doing, is riding 13. are flying 14. are getting 15. is dancing
