A-A+
Professor Smith and Professor Brown will______
问题详情
Professor Smith and Professor Brown will______in presenting the series of lectures on American literature.
A．alter
B．alternate
C．substitute
D．exchange请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：B
解析：alternate补充的，交替。alter改变，改动，变更。substitute替代，取代。exchange兑换，交流。
