你可能感兴趣的试题

单项选择题

（）for a long time，the ponds are all dried up and a lot of fish are dead.

A.There has been no rain
B.Having no rain
C.There having been no rain
D.There being no rain

单项选择题

Two Brazilian policemen were killed when（）

A.they failed to manage to land.
B.they involved in an outbreak of violence.
C.their helicopter came under fire.
D.they went through gunfire with gangsters.