Food safety is important. Rules ______ to stop people from food pollution.
—How long _______it _______ you to work out such a difficult problem? —About thirty minutes. A. did… take B. does… take C. did…cost
Excuse me, sir. Could you tell me _______? A. where can I get a post card B. where I can get a post card C. that I could get a post card
My hobby is changing all the time. Now I am _______ in collecting coins. It’s_______ and valuable. A. interesting; interested B. interested; interesting C. interested; interest
As we know, the Changjiang River is one of _______rivers in the world. A. long B. longer C. the longest
John and I will go out for a walk after we _______our homework. A. finish B. finished C. will finish