xcdamon 发表于 2016-4-16 11:06
楼上瞎说。。
两个都是可以的,但是不是这题的考点
a number of / numbers of + 可数名词复数 + 动词复数
elusive 发表于 2016-4-16 13:37
我哪里瞎说了????
C之所以错了是因为numbers of staff members 不如 a large staff简洁
a staff= a gr ...
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