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单选题
1,3,5,7 and 9 are _______ numbers and 2,4,6 and 8 are not.
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单选题
These are two _______ issuers, but people often take them as one.
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单选题
Before he left the White House, the president made a _______ speech.
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单选题
A new idea began to _______ from his mind when he was on his way backhome.
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单选题
In Nearly any country, there always exists a _______ gap between the old and the young.
