Professor Wilson has a speaking ______ for this weekend, so-he declined the invitation by his friends for dinner.

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问题 Professor Wilson has a speaking ______ for this weekend, so-he declined the invitation by his friends for dinner.

选项 A、employment
B、enhancement
C、engagement
D、assignment

答案C

解析名词辨义。这四个选项的词性都是名词，其中employment表示“雇用；使用”，enhancement是指“增进，增加”，engagement表示“约会；约定”，assignment表示“分配；指派”。根据句意，教授本周末有一个演讲，应该选择C)。

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大学英语六级

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