----It'susefulforthedeafandblindpeopletolearnbodylangua...

問題詳情：

----It's useful for the deaf and blind people to learn body language.   

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

A. competition  B. vacation  C. production   D communication

【回答】

D

知識點：名詞

題型：選擇題