{01}— May I go and play with my friend this afternoon, Dad? — No, you can"t go out _____ your work is being done. A.the moment B.until C.as D.before 解析: 本题选C。
{02}We had just covered a distance of three miles _____ the engine of the car _____. A.then; was broken B.when; broke down C.until; was failed D.since; burst out 解析: 本题选B。
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