单选题When ______ , many racists cannot give a logical reason for their attitudes towards other racial groups.A questioningB having been questionedC having questionedD questioned
题目
单选题
When ______ , many racists cannot give a logical reason for their attitudes towards other racial groups.
A
questioning
B
having been questioned
C
having questioned
D
questioned
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参考答案和解析
正确答案：
D
解析：
句意：从句的主语只有和主句一致时，才可被省略。when引导时间状语从句，主语为many racists，与question为动宾关系，question用被动形式。
句意：从句的主语只有和主句一致时，才可被省略。when引导时间状语从句，主语为many racists，与question为动宾关系，question用被动形式。