【题目】Mother often tells us never to put off ______ we can do today till tomorrow.
A. where B. when
C. what D. which
在线课程【答案】C
【解析】考查宾语从句的用法。句意：母亲经常告诉我们不要把今天能做的事情推迟到明天去做。题干中put off的宾语从句中缺少do的宾语，what引导宾语从句时，在从句中做主语或宾语，应用what引导。where在宾语从句中作地点状语；when在宾语从句中作时间状语；which在宾语从句中作定语。故选C。