题目内容
The air in the room ________ fresh, I think.
- A.isn’t
- B.didn’t
- C.hasn’t
- D.weren’t
A
fresh是个形容词，意为“新鲜的”，前面应用连系动词，air做主语时，动词用单数。
fresh是个形容词，意为“新鲜的”，前面应用连系动词，air做主语时，动词用单数。
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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 |
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| stop, though, sleep, their, bad, city, ill, we, start, fresh, please, breath |
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