—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:【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”。故函数中,自变量x的取值范围是 ( )A. x < 1 B. x ≤ 1 C. x >1 D. x ≥1