2 【单选题】 Professor Smith and Professor Brown will ________ in presenting the series of lectures on American literature. A、 alter B、 alternate C、 substitute D、 exchange

2
【单选题】

Professor Smith and Professor Brown will ________ in presenting the series of

lectures on American literature.

A、

alter

B、

alternate
C、

substitute
D、

exchange

出自：西安科技大学-大学英语2

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