皮皮学，免费搜题
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【单选题】
化学性污染指的是?A.
食品自身的毒素
B.
食品添加剂
C.
加工储存运输中产生的毒素
D.
以上都是
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皮皮学刷刷变学霸
举一反三
【单选题】The ground has been cleared and houses for those homeless people now.
A.
build
B.
have built
C.
are built
D.
are being built
【简答题】As we walk through the Hutongs, you may find most of them look almost ( ) with gray-colored walls and bricks. Actually inside those walls are the courtyard houses, where people live.
【简答题】They are tearing _____ those old houses to put up a new office building.
【单选题】Houses in the country are ____ than those in the city.
A.
much less expensive
B.
more expensive
C.
much more cheaper
D.
more cheaper
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