Coughing _____ also be used for social reasons, such as the coughing before giving a speech.
We _______ last night, but we went to the concert instead.A should have studied B. might study C. must have studied D. would study
—I’ll do the washing-up. Jack, would you please do the floors?—_______.
—Have you finish reading Jane Eyre?— No ,I_____ my homework all day yesterday A had done B would do C was doing D do
With so many people __in English every day, we can see it will be more and more important ___ a good knowledge of English.
Farmers in Kaifeng grow a lot of peanuts every year, some of __ shipped to foreign countries.