英语选择题11

When____theeducationsystemsofChinaandBritain,theprofessorgaveadetailedcomparisonbetwe... When ____ the education systems of China and Britain, the professor gave a detailed comparison between the two.
选项:
a、being asked to compare
b、asked him to compare
c、asking him to compare
d、asked to compare
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lynnelinxue
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a、being asked to compare

很显然,是被问。被动句。
the professor 是主语BC显然不对。

如果用D:

When ____ the education systems of China and Britain,这个从句,应该用完整的形式。

he was asked to compare
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