【題目】—No one can achieve anything of real significance he works very hard.

— I got it, Dad. I’ll study hard from now on.

A. because B. if C. unless D. when

【答案】C

【解析】考查狀語從句。句意：一個人要是不努力, 他就將一事無成。根據(jù)句意可知選unless引導(dǎo)條件狀語從句。

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