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【单选题】
【B14】A.
an offer
B.
an announcement
C.
a story
D.
a re-appearance
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mg src="file:///C:\Users\ADMINI~1\AppData\Local\Temp\ksohtml11656\wps23.png">几百微米
B.
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C.
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A.
are being painted
B.
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C.
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D.
are being painting
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