Cars do cause us some health problems—in fact far more serious ________ than mobile phones do.
Alan is a careful driver , but he drives ____ of my friends. A. more carefully B. the most carefully C. less carefully D. the least carefully.
Danny _____ hard for long to realize his dream and now he is popular.
You will find _______ great benefit a puter will be of each time you use it to help you work..
The speech which he made ______ the project bothered me greatly.
You don’t need to explain so much about this theory to Peter. _______ , he is clever enough to understand it .