----ThestudentsofGrade9inChangchunhavetotakeparti...

问题详情：

       ----The students of Grade 9 in Changchun have to take part in the P.E. test from 2016.

     ----Yes. ________ you want to pass it and be stronger, practice more.

       A. until                         B. if                             C. unless                      D. or

【回答】

B

知识点：连词

题型：选择题