單項填空Humansareslowlypollutingthewholeworldandthereisnote...

問題詳情：

單項填空

Humans are slowly polluting the whole world and there is not enough clean air _______ water. We must take action, _______ things will be worse.

A. and; and       B. or; and        C. and; or      D. or; or

【回答】

D

知識點：連詞

題型：選擇題