题目内容
She read the letter through before sending it, ______ for spelling mistakes.
A. checked B. to be checking C. checking D. having checked
C
解析:
现在分词短语在此表示伴随。
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题目内容
She read the letter through before sending it, ______ for spelling mistakes.
A. checked B. to be checking C. checking D. having checked
C
现在分词短语在此表示伴随。