题目内容
The air in Beijing is getting much ________ now than a few years ago．
[ ]
A．clean
B．cleaner
C．cleanest
D．the cleanest
答案：B
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The air in Beijing is getting much ______ now than a few years ago.
| A．clean | B．cleaner | C．cleanest | D．the cleanest |
If there are trees, the air in our city will be cleaner.
| A．less, more | B．more, more | C．more, much | D．much, more |
先阅读短文，掌握其大意。然后从方框中所给的词中选出恰当的10个，并用其适当形式填空，每个词限用一次。(每小题1分)
| stop, though, sleep, their, bad, city, ill, we, start, fresh, please, breath |
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