问题
选择题
.When _____ if he had seen her, Mattew just shook his head.
A．asking
B．asked
C．being asked
D．being asking
答案
答案：B
考查状语从句的省略。主语Mattew 与ask 之间是被动关系，所以用过去分词asked，前省略了he was ，所以选B。
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.When _____ if he had seen her, Mattew just shook his head.
A．asking
B．asked
C．being asked
D．being asking
答案：B
考查状语从句的省略。主语Mattew 与ask 之间是被动关系，所以用过去分词asked，前省略了he was ，所以选B。