问题
选择题
_______ we are doing now has never been done before.
A．That
B．What
C．Which
D．Whether
答案
B
句中的主语从句由连接代词引导，句意为“我们现在正在做前人从未做过的事”。
搜题请搜索小程序“爱下问搜题”
_______ we are doing now has never been done before.
A．That
B．What
C．Which
D．Whether
B
句中的主语从句由连接代词引导，句意为“我们现在正在做前人从未做过的事”。