问题
选择题
____has been said before, it is not easy to learn a foreign language.
A．As
B．It
C．What
D．As it
答案
答案：A
as表“正如”，引导非限制性定语从句，代替后面整个主句的意思。
搜题请搜索小程序“爱下问搜题”
____has been said before, it is not easy to learn a foreign language.
A．As
B．It
C．What
D．As it
答案：A
as表“正如”，引导非限制性定语从句，代替后面整个主句的意思。
