题目内容
根据所给动词的适当形式填空
Tommy is busy ________(answer)their questions.
答案:answering
解析:
解析:
|
固定搭配be busy doing sth“忙于干某事” |
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题目内容
根据所给动词的适当形式填空
Tommy is busy ________(answer)their questions.
|
固定搭配be busy doing sth“忙于干某事” |