班用安全绳在大火中还可用作()。
(A)破拆
(B)导向绳
(C)灭火
(D)通信
参考答案:B
— Does your mother often _____ newspapers after supper?
— Yes, but sometimes she _____ TV. [ ]
A. read; watches
B. look; sees
C. reads; watch
D. look; see
影响地下水的人为因素是()、()、()等。