Here number of peoplenumber of themfifty.A. are a; The isB. is the; A areC. is a;

问题补充：

Here number of people. number of themfifty.

A. are, a; The, is

B. is ,the; A, are

C. is, a; The are

D. are, the; A, is

答案：

(答案→)A. are, a; The, is

B. is ,the; A, are

C. is, a; The are

D. are, the; A, is

解析：句意：这儿有很多人，他们的数量是50。a number of 许多，后跟可数名词复数；the number of ……的数量，只是一个数字，所以用单数，故选A。