问题

days after the aircraft went missing, an international effort ships and planes hasn’t found any wreckage, growing frustration for the families of the 239 people on board.

A:involved; causing
B:to involve; caused
C:involving; causing
D:involving; having caused;

正确答案是：

同类题型

All the ingredients are in the bowl. Please mix __.

l’m always a little nervouswhen I talk to Mr. Smith.– _____ Heis strict, but he is kind to his students.-_,

More than one the people heart and soul.

The young man from Luo Yang Called Liu Yongying is really a kind — hearted guy , who is ready to help others .— A good fellow（小伙子）_____

We are informed that the Weifang International Kite Festival starts at 7:00.—Oh, I didn’t expect it was so early! I ____ to go out for dinner with my friends first