99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

<ruby id="chq2m"><xmp id="chq2m"></xmp></ruby>

單項選擇題

Such problem （）air, water, and noise pollutions are becoming more and more serious in some big cities.

A.like
B.as
C.of
D.about

你可能感興趣的試題

單項選擇題

I really hope that you will （）your trip to Canada and get back as soon as possible when people have to knowledge of the law.

A.prefer
B.refer
C.enjoy
D.i nfer

單項選擇題

He said that he was （）aware of the difficulty of being a father.

A.highly
B.fully
C.soundly
D.firmly

<em id="op7xp"></em>