-It'susefulforthedeafpeopletolearnsignlanguage.-Yes,it...

問題詳情：

 -It's useful for the deaf people to learn sign language.

-Yes, it's a major way of _____ for them.

A. suggestion             B. vacation        C. production           D. communication

【回答】

D

知識點：名詞

題型：選擇題