You should your buttons before you give a lecture. A.do up B.speed up C.carry up
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You should ________ your buttons before you give a lecture.
A.do up
B.speed up
C.carry up
D.clear up
试题答案
答案:A
提示:button在这里表示按钮,do up的意思是重新整修,这里是说在你做演讲之前应该重新计时
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