题目内容
( ) 10. Sally is busy her studies and her mother is busy trees.
A. at;plant B. to;planting
C. with;planting D. in;to plant
10. C be busy with sth.意为“忙于某事”;be busy doing sth.意为“忙于做某事”。
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题目内容
( ) 10. Sally is busy her studies and her mother is busy trees.
A. at;plant B. to;planting
C. with;planting D. in;to plant
10. C be busy with sth.意为“忙于某事”;be busy doing sth.意为“忙于做某事”。