单选题Itwasnotuntil________that_____

单选题 It was not until ________ that ________ to prepare his lessons．A.did his father come in; the boy beganB.his father came in; the boy beganC.did his father come in; did the boy beginD.his father came in; did the boy begin

B解析本题是强调句，被强调部分是由until引导的时间状语从句，应该用陈述语序，故选择B或D．that后面是主句，也应用陈述语序，所以

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