The ___________ of thunder frightened the children.

A．rumbling

B．crying

C．shouting

D．screaming

You ________ leave rubbish in a park. ( )

A．needn't

B．mustn't

C．can't

D．may not

用动词正确形式填空：be ( are, am, is)
1. I_____ (be) doing homework now.
2. Mike and John ______ (be) drawing pictures.
3. Amy ____ (be) reading a book.
4. We are __________ (write) an e—mail.
5. Zhang Peng is _________ (listen) to music.
6. They _____ (be) _____________ (answer) the phone.

We are rabbits. We  a new flat.

A．have

B．has

用所给单词的适当形式填空。
1. We make ________ (snowman) in China.
2. I am going to have a _________ (skate) lesson.
3. Danny learns________(fast)
4. Can you ________ (stand) up on the ice?
5. What __________ (happen) to Danny.