福建省大田一中2011-2012学年高一暑假练习（三）（英语）
1.When changing lanes, a driver should use his turning signal to let other drivers know______.
A. he is entering which lane B. which lane he is entering
C. is he entering which lane D. which lane is he entering
2.One reason for her preference for city life is ______ she can have easy access to places like shops and restaurants.
A. that B. how C. what D. why
3.To improve the quality of our products, we asked for suggestions ______had used the products.
A. whatever B. who C. whichever D. which
4.It is uncertain ______ side effect the medicine will bring about, although about two thousand patients have taken it.
A．that B．what C．how D．whether
