单项选择题
A. until B. when C. after D. so
Don't forget to bring your umbrella （）you go out A. sin...
单项选择题Don't forget to bring your umbrella （）you go out
A. since B. because C. for D. when
（）you hear from Sue, let me know as soon as possible A....
单项选择题（）you hear from Sue, let me know as soon as possible
A. Though B. If C. Since D. Or
Mark did his best on the exam （）he succeeded A. so ...
单项选择题Mark did his best on the exam （）he succeeded
A. so B. when C. while D. if
