34. When he knocked at the door, my mother was busy supper.A. preparing forB. in preparin
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解决时间 2021-01-03 22:54
- 提问者网友：抽煙菂渘情少年
- 2021-01-02 23:43
34. When he knocked at the door, my mother was busy supper.
A. preparing for
B. in preparing
C. to prepare for
D. to prepare
最佳答案
- 五星知识达人网友：往事埋风中
- 2021-01-03 00:32
A. preparing for(答案→)B. in preparingC. to prepare forD. to prepare解析：“be busy (in)doing something” 忙于干谋士，要求接动词的-ing形式。准备的直接宾语是“supper”,故其前面不用介词for。
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- 1楼网友：平生事
- 2021-01-03 01:00
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