(   ) 10.       you are well.  Then we can go skating.

   A. I’m afraid   B. I hope

   C.  I’m sorry   D. I'm sure

(   ) 9. The boy tried          up the tree,but he failed.

   A. climb   B. climbed

   C.  to climb   D. climbing

(   ) 8. She’s not strong enough       walk ing up mountains.

   A. to go   B. going   C. go   D. went

(   ) 7. Look at the stars. Can you count them clearly?

—No. There are      stars in the sky.

   A. two billions   B. two billions of

   C.  billions of   D. two billion of

(   ) 6. Please send me a      when you get toCanada.

   A. message   B. idea

   C.  information   D. news

(   ) 5. As we all know,the light        faster than the sound.

   A. runs   B. walks   C. goes   D. travels

(   ) 4. We are going to travel to Beijing this weekend. Would you like to go with us?

—No,thanks. I      there twice.

   A. go   B. will go

   C.  be   D. have been

(   ) 3. All the students went to the cinema. But      of them has come back yet.

   A. all   B. neither   C. none   D. no one

(   ) 2. Have you decided whether to go there or not?

—No，I haven’t decided     .

   A. already   B. just

   C.  ever   D. yet

(   ) 1. Ninety teachers and         students plant trees every year.

   A. thousands; million of

   B.  thousand; million

   C.  thousands of;millions of

   D.  thousand;millions of