If you don't learn something useful, you will feel sad ______ you are old. [ ]A. what B. when C

题目简介

If you don't learn something useful, you will feel sad ______ you are old. [ ]A. what B. when C

题目详情

If you don't learn something useful, you will feel sad ______ you are old.
[     ]
A. what
B. when
C. which
D. why
题型:单选题难度:中档来源:0101 模拟题

答案

B

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