— Have you seen Mr. Smith?— He arrived ______ you were asleep. [ ]A. since B. whileC. beforeD. until

题目简介

— Have you seen Mr. Smith?— He arrived ______ you were asleep. [ ]A. since B. whileC. beforeD. until

题目详情

— Have you seen Mr. Smith?    
— He arrived ______ you were asleep.
[     ]
A. since
B. while
C. before
D. until
题型:单选题难度:中档来源:北京模拟题

答案

B

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