Professor Smith and Professor Brown will _____ in giving the class lectures.
A. exchange B. alter C. shift D. alternate
Professor Smith and Professor Brown will _____ in giving the class lectures.
A. exchange B. alter C. shift D. alternate
D
alternate vt./vi. 轮流，交替发生或出现；shift般动，移动(vt.);转移到，迁移(vi.);改变；exchange交换;exchange... for ... 用.......换......;alter(部分)修改。