【题目】Kate heard a man's voice in the background, but she couldn't ___________ what he was saying.
A. set asideB. take back
C. make outD. keep off
在线课程【答案】C
【解析】
本题考查动词词组辨析。句意： 凯特听到背景中有一个男人的声音，但她听不清他在说什么。set aside“存储，留出”； take back“收回，拿回”；make out“辨认出，理解，了解”； keep off“（使）避开”。故选C。