____has been said before, it is not easy to learn a foreign language.A.AsB.ItC.WhatD.As it-英语

题目简介

____has been said before, it is not easy to learn a foreign language.A.AsB.ItC.WhatD.As it-英语

题目详情

____has been said before, it is not easy to learn a foreign language.
A.AsB.ItC.WhatD.As it
题型:单选题难度:偏易来源:不详

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。

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