_______they_______,theirclassmateswereallintheclassroom...

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