—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
—Excuse me. How far is the post office from here?
—It’s about _______walk.
A. ten minute B. ten minutes C. ten minutes’
