It is evident that we have to do something to improve the hazy weather. Otherwise the sea might become _.
A.vicious
B.vigorous
C.inedible
D.invisible
正确答案:invisible
It is evident that we have to do something to improve the hazy weather. Otherwise the sea might become _.
A.vicious
B.vigorous
C.inedible
D.invisible
正确答案:invisible