摘要：It was his mother came in to prepare his lessons. A.not until,did the boy begin B.until,that the boy began C.until,did the boy begin D.not until,that the boy began 状语从句专练答案: 真题:1-5 DBACD 6-10 CDCAB 11-15 BBDCB 16-20 DCCDC 21-25 DACDD 26-30 BCCBA 强化:1-5 CABAD 6-10 CBCBD 11-15 ACDDD 16-20 DBCDC 21-25 CCDBB 26-30 AACDD

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