问题
选择题
We should learn how to value what we have ______ it is too late.
A．when
B．after
C．before
D．until
答案
答案：C
搜题请搜索小程序“爱下问搜题”
We should learn how to value what we have ______ it is too late.
A．when
B．after
C．before
D．until
答案：C