中文谷Weurge
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問題詳情：
We urge ________ extreme caution in ________ use of this medicine, which has not been officially approved yet.
A. an; the B. an; / C. /; the D. /; /
【回答】
C
知識點：冠詞
題型：選擇題
標籤：
Weurge
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