A. eat                        
B. have                       
C. having

A. does
B. do
C. doing

[     ]

A. play
B. playing
C. to play

[     ]

A. write
B. writes
C. writing

1. go _________________
2. come _________________
3. swim _________________
4. run _________________
5. learn _________________
6. dance _________________
7. take _________________
8. write _________________
9. skate _________________
10. sing _________________

1.  The children are c______________.
2.  Flying a kite is e______________ for him.
3.  I fell at the Palace Museum, and I h______________ my tail.
4.  This is a c______________. You can s______________ our friend an e______________.
5.  I often play c______________ w______________ my friends.

Look! My sister ______________ (play) with the toy cars.

1. Look out! The car is _____________ (come).
2. The horse is _____________ (run) very fast.
3. He often _____________ (go) to school on foot.
4. I can _____________ (dance) and sing.
5. He didn't _____________ (finish) homework.
6. He _____________ (may) be our new teacher.
7. Frogs _____________ (catch) mosquitoes (蚊子) now.
8. Tom _____________ (write) to his parents every month.
9. I'm going _____________ (fly) a kite in the playground.
10. Sometimes she _____________ (go shop) with her mother.

[     ]

A. are singing
B. sing
C. are sing
D. singing