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II单项选择
21. Mother is _____ supper and the rest of the family are sitting at the table _____ it.
A preparing, prepared B preparing, prepared for
C preparing for, preparing D prepared for, preparing for
22. Someone called in the middle of the night, but they hung up ____ I could answer the phone.
A as B since C until D before
23．The roof fell ____ he had time to dash into the room to save his baby.
21. Mother is _____ supper and the rest of the family are sitting at the table _____ it.
A preparing, prepared B preparing, prepared for
C preparing for, preparing D prepared for, preparing for
22. Someone called in the middle of the night, but they hung up ____ I could answer the phone.
A as B since C until D before
23．The roof fell ____ he had time to dash into the room to save his baby.
