—Would you like to go bike riding with us tomorrow ?—Sure , ______ I am busy .[ ]A. since B. unless

题目简介

—Would you like to go bike riding with us tomorrow ?—Sure , ______ I am busy .[ ]A. since B. unless

题目详情

—Would you like to go bike riding with us tomorrow ?  
—Sure , ______ I am busy .
[     ]
A. since    
B. unless    
C. when      
D. until
题型:单选题难度:中档来源:同步题

答案

B

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