He thinks _____ history about Chinese is very important.
A. studied B. studying C. studies D. study
How many states _______ the United States? Fifty.
A. turn up B. make up C. end up D. give up
My mother is strict both _____ me and ____ her work.
A. with; with B. with; in C. in; in D. in; with
------ 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
You should keep working hard ____ you have passed the exam.
A. since B. because C. so D. even though
Li Ming is in poor health. He should pay more attention _________ exercise.
A. to take B. to taking C. for taking D. in taking
