Question

I’ll visit the professor tomorrow ,___he will be back from Shanghai . A. who B. that C. when D. w

I’ll visit the professor tomorrow ,___he will be back from Shanghai .  A. who      B. that         C. when        D. which

Answer 1

答案选择 C when
这道题考查定语从句的知识。此句为非限制性定语从句，从句中缺时间状语 , 指代主句中的时间 tomorrow, 故用关系副词 when.