题目内容
9. Mary clapped her hand over her mouth _______ she realized what she had said.
A. while B. as soon as C. suddenly D. then
B
解析:
选 B。根据语境可推知。如下面一题也选as soon as:
_______ he became rich he cast aside all his old friends who gave him some help.
A. While B. As soon as
C. Suddenly D. Then
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