--What on the desk? --There a pen and some books.A. are, is B. is, isC. is, are
-A number of college students_______ to work in China's rural (农村的) areas. -Yes, we call them "college-graduate village officials". Their number is getting_______. They brought new ideas to the less-developed villages.
-Mike wants to know if_______ a picnic tomorrow. -Yes. But if it_______, we'll visit the museum instead.
Our country is_______ 56 nations and_______ of them can be tom away from the motherland.
-Do you know that Armstrong got his flying license in his_______, even before he could drive a car! -That's amazing. He is a_______ pilot.
The doctors did what they could_______ those w-ho were injured in the terrible accident.