I can think of many cases _____ students obviously knew a lot of English words and expressions but couldn’t write a good essay

Where does he live now — In _______ is now part of the Economic Development Zone.

You’d better ______ work too hard likethis.—I see. You mean working too hard makes onetired and ill.

Look! How long _____ like this— Three weeks! It’s usual here that rain _____ without stopping these days of the year.

______ the prices of color TV sets down by 50%, the company had a very hard time.