-- In the countryside you can enjoy fresh air, blue sky and quiet surroundings.
--- _______ more and more retired people are escaping from the crowded city.
A. It is no wonder B. It is no doubt
C. There is no need D. There is no possibility
— Remember the first time we met, Jim?
— Of course I do. You _______ in the library.
A. were reading B. had read C. have read D. read
I always prefer _______ a bike rather than _______ to work.
A. riding, drive B. to ride, drive
C. ride, driving D. to ride, driving
When you read the book, you’d better make a mark _____ you have any questions.
A. at which B. at where C. the place D. where
AIDS is said _______ the biggest health challenge to both men and women in that area over the past few years.
A. that it is B. to be C. that it has been D. to have been
________ the problem of land erosion(��ʴ) getting more serious, the government is searching for a way to deal with it.
A. As B. When C. With D. If
