Public opinion is fickle and more so in a nation like ours where illiteracy
单选题since his grandfather selected blocks in the 1890s.
A.was there
B.were there
C.are there
D.have been there
参考答案:D
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答案解析:判断集体名词的单复数。本题中的family指的是家庭成员,因此谓语动词 应该用复数。从后面since引导的时间状语从句来判断,应该用完成时,故选D。