5.   There are a lot of children on the playground.________of them are having a good time.

 用all或both填空。

4.   His parents are___________   listening to the radio.

(   ) 3. Old Mr. Black lives happily with his three dogs._________ of them are part of his family.

A. Both             B. All

C. None             D. Either

(   ) 2. ―Which of these two English books will you borrow?

―I'll borrow ____________  of them, because they're very interesting.

A. some           B. all

C. any            D. both

(   ) 1. Maria and her friend__________ tall girls.

A. is both      B. are both

C. both are      D. both 

3.   Tom should go to the hospital at once (改为否定句)

Tom___________  _________ to the hospital at once.

(   ) 2. ― Wow! You are cool!

-I __________ wear my school uniform, but  it's washed and wet.

A. should          B. can

 C. may            D. will

 (   ) 1. - Anna, you always get better grades than your sister. I think you ________  help your sister        more.

-OK, Mom.
A. may            B. can't

C. should           D. may not

4.   He should call her and say "thank you".(改为一般疑问句）

_________  he ________her and say"thank you"?