A driver should __ the road when .A concentrate on; drive B. concentrate in; driving C. concentrate to; drove D. concentrate on; driving
The government has taken measures to______the high prices of daily goods to keep the market stable.
It ______ we had stayed together for a couple of weeks ______ I found we had a lot in common.
-Don't forget to return the book in two weeks. -______. Don't worry about it.
What a bargain! The price of this dress is_______ that of the skirt.
Some college students are seen doing _____work they can find to support themselves.