问题
选择题
Choose the correct sentence:____.
A．That’s all what I need.
B．That’s something I need
C．That’s what that I need.
D．That’s all which I need.
答案
答案：B
连接代词what在主语从句、表语从句、宾语从句中，相当于“somehing that/things that”。先行词为all，定语从句只能用that。本题省去了something后的that。