17．____your brother or you to blame for the broken TV set?
A．Be B．Are C Is D Were
（重庆一中高三下第三次月考）14. An EU official stressed thateffective measures could be taken, the future for Europe was indeed dark.
| A．until | B．unless | C．since | D．while |
（年(春)重庆市高三考前冲刺测试卷）13. __ you get no applause, you should accept a curtain call gracefully and appreciate your own efforts.
| A．Even though | B．As long as | C．Until | D．As far as |
—I wonder how much you charge for your services.
—The first two are free the third costs $30.
| A．while | B．until | C．when | D．before |
25. ______ all of you are top students, only one will be chosen for the coming competition.
| A．While | B．Since | C．If | D．As |
Sally worked late in the evening to finish her report __________ her boss could read it first thing next morning.
| A．so that | B．because | C．before | D．or else |