When he knocked at the door, my mother was busy supper. A. preparing for B. in preparing C. to prepare for D. to prepare 查看更多

 

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When he knocked at the door, my mother was busy ____ supper.

A. preparing for                                  B. in preparing

C. to prepare for                                 D. to prepare

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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

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When he knocked at the door, my mother was busy ____ supper.

A. preparing for                                   B. in preparing

C. to prepare for                                 D. to prepare

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When he knocked at the door, my mother was busy ____ supper.

A. preparing for                                   B. in preparing

C. to prepare for                                 D. to prepare

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When he knocked at the door, my mother was busy ____ supper.

A. preparing for            B. in preparing

C. to prepare for            D. to prepare

 

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