问题补充:
单选题Infaceofdifficultiestheclimbers______inthehopeofreachingthetopbeforedark.A.insisted onB.looked upC.turned awayD.kept on
答案:
D解析keep on可用作及物动词和不及物动词, 意思为 “继续”。句意:尽管困难重重,登山队员们继续前进,希望天黑前到达山顶。insist on为及物动词,意思为“坚持”;look up查寻,向上看;仰视;turn away转过脸去;转换方向。