The zoo keepers is worried because the number of visitors smallerand smaller.A. becomeB. b

发布时间：2020-08-17 09:51:55

The zoo keepers is worried because the number of visitors             smaller
and smaller.
A. bee
B. became
C. is being
D. have bee

网友回答

A. bee
B. became
(答案→)C. is being
D. have bee
解析：考查主谓一致。the number of……的数目，谓语动词用单数形式。根据句意用现在进行时。句意：动物管理员担心游客的数量正在变得越来越少。
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