The population of the world in 20th century became very much _________than that in 19th.
—Kangkang asked the old lady . A.she has seen a doctor B.whether she has seen a doctor C.if she had seen a doctor
We have lived in Longyan 15 years ago. A. for B. in C. since
The country is very poor. _____ of the people _____ enough food to eat. A. Two thirds; have B. Two thirds; doesn’t have C. Two thirds; don’t have
—Did you _____ climbing Mount Huang yeaterday? —Yes.We had a good time there. A.succeed in B.keep on C.give up
______ you study harder, you’ll fall behind others. A.Once B.Unless C.Until