It'snecessaryforhumanbeingstobreatheO2andplantscan
問題詳情:
It's necessary for human beings to breathe O2 and plants can ________ it.
A. develop B. produce C. improve D. introduce
【回答】
B
知識點:動詞和動詞短語
題型:選擇題
問題詳情:
It's necessary for human beings to breathe O2 and plants can ________ it.
A. develop B. produce C. improve D. introduce
【回答】
B
知識點:動詞和動詞短語
題型:選擇題