Airpollutionisgettingmoreandmoreserious,sowemusttakeact...
問題詳情:
Air pollution is getting more and more serious,so we must take action________it is too late.
A.before B.after
C.until D.when
【回答】
A
知識點:連詞
題型:選擇題
問題詳情:
Air pollution is getting more and more serious,so we must take action________it is too late.
A.before B.after
C.until D.when
【回答】
A
知識點:連詞
題型:選擇題