【单选题】【消耗次数：1】
She had made many ( ) into the quality of the computer before buying one.
①
inquiry
②
inquiries
③
search
④
research
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①
skill
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degree
③
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①
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①
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②
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She_______ the door before she goes away.
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①
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①
had locked
②
is locking
③
has locked
④
was locking
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①
complains
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随机题目
【单选题】
有梁板的柱高下列说法正确的是（）
①
自柱基上表面至上一层楼板上表面之间的高度
②
自柱基上表面至上一层楼板下表面之间的高度
③
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④
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