----How about the pollution in the countryside?
--- Luckily, it's not as serious as _______ in the big cities.
| A．that | B．it | C．one | D．Those |
相关试题
选出划线部分发音不同的一项。
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What’s this ________ ? It’s a hat.
| A．in the English | B．in English |
| C．for English | D．at English |
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