—Jim, let’s go out to play basketball.
—Oh, I won’t do that___ I finish my homework.
A. if B. until C. because D. since
答案
B
解析 句意：——吉姆，我们出去打篮球吧。——哦，我要做完作业才能做那件事。A. if如果；B. until直到……为止；C. because因为；D. since自从。not…until直到……才……。until引导时间状语从句，故答案为B。
Ted has ten soccer balls, _____he doesn't play them．
A．and B．with C．but D．of
Don’t fight in class __________don’t run in the hallways．
A．or B．so C．but D．and
Susan is good-looking，__________she’s a little hit short．
A．so B．with C．or D．but
Jane, please turn off the lights ______ you leave the classroom.
A．after B．before C．until D．but
--Hurry up! The bus is coming．
--Wait a minute．Don't cross the street ________ the traffic lights are green．
A．until B．after C．while D．since
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