题目内容
9．他们正忙着为植树作准备．Theyare busy getting ready for planting trees．
分析 are busy getting ready for．
解答 答案：are busy getting ready for．表达的是客观事实用一般现在时，表示忙于做某事be busy doing sth，为…做准备get ready for doing sth，故答案是are busy getting ready for．
点评 be busy doing sth侧重于动作 be busy with sth 侧重于状态
意思都一样，可以互换．
He is busy doing homework．=He is busy with homework．
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