Question

—Would you like to play tennis with me _________ it doesn’t rain tomorrow?
—Sure, _________ I am busy.

A．if; since

B．whether; but

C．if; unless

D．because; until

Answer 1

C

试题分析：句意：如果明天不下雨，你愿意和我一起打网球吗？当然，除非我忙。If如果，since自从，既然，由于；whether是否；but但是；unless除非；until直到。所以选C。