【題目】 __________ you are grown up, you must stop this childish behavior, or you'll make a fool of yourself.

A. Now that

B. Until

C. Although

D. Even if

【答案】A

【解析】now that引導(dǎo)原因狀語從句，意為“既然”。句意為“既然你已經(jīng)長大了，就必須停止這樣幼稚的行為，否則你會出丑的”。

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