all_____is needed is fresh airA the thing B that C what D wichA the thing B thatC what D wich
问题描述:
all_____is needed is fresh airA the thing B that C what D wich
A the thing B that
C what D wich
答
all that=what
选B
答
d
答
选that啊,定语从句,
A 不对因为从句中all应作主语,所以必须有关系代词
C 不对因为what不能引导定语从句
D不对因为定语从句中which不能代 all
答
A
答
B all 充当先行词,因为是不定代词,所以关系词用that来引导定语从句.
all that = what
答
B