中文谷_______they_______,theirclassmateswereallintheclassroom...
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問題詳情：
_______ they_______, their classmates were all in the classroom.
A. Before ; were arguing B. When ; are arguing
C. While ; were arguing D. While ; are arguing
【回答】
C
知識點：相似 相近詞比較
題型：選擇題
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