51. 【2019 • 湖北省咸宁市】—I am worried about ___________ I can enter a good high school or not.

51. 【2019 • 湖北省咸宁市】—I am worried about ___________ I can enter a good high school or not.
—Take it easy. Believe in yourself!
A. that B. when C. whether D. where
答案】C
解析】句意:——我担心我能否进入一所好的高中。——别紧张。相信你自己!about是介词,后接宾语从句。A. that当从句是陈述句时,用that引导,that不做任何成分,可省略;B. when什么时候;C. whether是否;D. where哪里。whether引导的从句常可以与连词or或or not直接连用。意为"是否"。故选C。
 
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