He collected information on 1,000 people, whose IQ when they were ten years old.[ ]A.is testedB.has

题目简介

He collected information on 1,000 people, whose IQ when they were ten years old.[ ]A.is testedB.has

题目详情

He collected information on 1,000 people, whose IQ       when they were ten years old.
[     ]
A.is tested
B.has tested
C.would test
D.had been tested
题型:单选题难度:中档来源:同步题

答案

D

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