—_________did the bell ring?—________ we were having dinner，the bell rang.

题型：单选题题类：常考题难易度：普通

山东省高密市高密四中文慧学校2016-2017学年八年级下学期英语开学考试试卷

—_________did the bell ring?

—________ we were having dinner，the bell rang.

A、when； when B、when； while C、while； while D、while； when

举一反三

—About twenty minutes' walk.

—For 20 years. How time flies!

— _____________, it's a little boring.

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