1.We are trying__________(work) hard at all the subjects.

2.There used to _________(be) a lot of manatees. But now there are few.

3.What was the air pollution__________(cause) by?

4.Have you ever__________(throw) away things you don't like to use?

5.I have also__________(set) up a website to sell clothes online.

6.Mark__________(work) in China for 10 years and now he teaches Chinese in Britain.

7.What would happen if he__________(go) back home late?

8.Can the book be__________(bring) back to my room?

9.--Why not__________(buy) John a toy car for his birthday?

--Good idea! He is crazy about cars.

10.The math problem is so hard. I really don't know how________(do) it.

My friend and I are interested in drawing, but of us is

good at it.

A. neither B. both C. none D. all

--Do you miss your parents far away?

--Yes, very much. They the hometown for over two years.

A. left B. have left

C. were away from D. have been away from

--What do you think of my shirt? It cotton.

--It looks nice on you.

A. is made in B. is made for

C. is made of D. is made by

We have never visited the museum, but we have it.

A. stood for B. belonged to

C. heard about D. kept on

－It's important for us to know _________ all the subjects.

－Yeah, group work is my favorite.

A. how to study B. when to study

C. which to study D. what to study

Before stamps, people didn't for the letters they sent,but for the letters they received.

A. pay B. cost C. spend D. take

Gian Tara is studying Chinese history

and culture now. They find them rich and amazing.

A. Both; and B. Not only; but also

C. Either; or D. Neither; nor

Please the water when you brush your teeth.

A. turn down B. turn off

C. turn on D. turn up

Excuse me, would you mind your voice down, please?

A. to keep B. keeping C. keep D. kept