Is he ______ an apple? ( )

A．eatting

B．eat

C．eating

--- What are you doing now?  (   )
--- I am _________.

A．sleep

B．to sleep

C．sleeping

D．sleeps

Some students are ______ in the classroom . （   ）

A．sing

B．singing

C．sung

情景会话。
1. 当对方在电话时Hello, 你应该这样回答：_____________。
A. Hello, I’m Nina. B. Hello, this is Nina.
2. 当对方问你：“What do you do?”你应该回答：_________。
A. I’m working.     B. I’m a worker.
3. 当你问别人“你正在干什么?”，应该说：_____________。
A. What is he doing? B. What are you doing?
4. 当你问别人“你喜欢的季节是什么?”应该说：_______。
A. What’s your like season? B. What’s your favorite season?
5. 当别人问你“What’s the dog doing?”，你应该回答：_____。
A. It's play football. B. It’s playing football.

用动词适当形式填空。
1. Listen! Who___________(sing) in the room?
2. ---Where is your father?
---He___________(fix)the clock now.
3. It’s 8:00. The Greens______________(watch) TV.
4. Look! Some children________(clean) the classroom.
5. ---_______your brother_______(play) basketball every day?
---No, just on weekends.
6. My brother can’t_______(play) chess.