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<正> I.单项选择:从A、B、C、D四个选项中,选出可以填入空白处的正确答案。1.Are you__ the 100-metre race today? A.on B.to C.for D.in2.I’m afraid you didn’t do your homework__ A.careful enough B.carefully enough C.enough careful D.enough carefully3.They__a class meeting last Friday.