— do you go to bed? —I go to bed at 9:00.[ ]
A. What
B. Where
C. When
D. Why
答案:C
_____, water can be changed into gas.
A.Heated
B.Being heated
C.Having heated
D.Having been heated
从我国的海陆位置来看,我国位于_____大陆东部,_____西岸。陆上与_____个国家相邻,海上又与______个国家相望。