【C15】A．AsB．AfterC．WhileD．Before

【C15】A．whileB．afterC．beforeD．over

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【C15】A．beforeB．afterC．includingD．excluding

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【C14】A．beforeB．afterC．whileD．for

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Animals think much ____ building their houses.A: asB: duringC: whileD: because

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【C15】A．AtB．AfterC．Not untilD．Before

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【C8】A．laterB．afterC．agoD．before

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【C19】A．AlthoughB．AfterC．WhereD．Before

答案解析