the day are becoming shorter and shorter ___it is now DecemberA) whenB) forC) afterD) until
问题描述：
the day are becoming shorter and shorter ___it is now December
A) when
B) for
C) after
D) until
答
A 时间状语从句 剩下的不能引导
答
B for
for当因为讲，其它几个词都没有这个意思
答
B for
for因为,引导原因壮语从句 ：）