Li Ming is in poor health. He should pay more attention _________ exercise. 

A. to take  B. to taking  C. for taking  D. in taking

You should keep working hard ____ you have passed the exam.

A. since   B. because   C. so   D. even though

------ Do you know where Li Ming is working _____?  ------ Maybe in Guangzhou, I think.

A. at first  B. at least  C. at last  D. at present

My mother is strict both _____ me and ____ her work.

A. with; with  B. with; in   C. in; in   D. in; with

How many states _______ the United States? Fifty. 

A. turn up  B. make up  C. end up  D. give up

He thinks _____ history about Chinese is very important.

A. studied   B. studying   C. studies   D. study

Can you learn English ________ chatting on the Internet?

A. in  B. with  C. by  D. for

 I had some problems _____ my homework.  

A. to finish  B. finishing  C. finishes  D. finish

 He didn’t study hard, so he was afraid ______ in the exam. 

A. fail  B. to fail  C. failing  D. failed

Did you see them ____ basketball this morning? 

A. playing   B. were playing    C. to play   D. are playing