Susan will not arrive at the airport on time _____ she hurries up.[ ]A. once B. if C. whenD. unless

题目简介

Susan will not arrive at the airport on time _____ she hurries up.[ ]A. once B. if C. whenD. unless

题目详情

Susan will not arrive at the airport on time _____ she hurries up.
[     ]
A. once
B. if
C. when
D. unless
题型:单选题难度:中档来源:同步题

答案

D

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