【单选题】【消耗次数：1】
How many books do you have? I have [填空] book．Thats [填空] English book．
①
a,an
②
a,one
③
on,an
④
one,one
参考答案：
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This book is ______ that one, but ______ than that one.
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as difficult as; expensive
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as more difficult as; more expensive
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as difficult as; more expensive
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more difficult as; as expensive
【单选题】
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This book is_____that one. But______than that one.
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as difficult as ;expensive
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as more difficult as ; more expensive
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as difficult as ; more expensive
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According to the author, in order to have a good command of English one must ____.
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