问题
选择题
—I still haven’t decided whether to go or not.
—But your time is running out. Please make up your mind ______ it is too late.
A．when
B．since
C．until
D．before
答案
答案：D
本题考查连词。第二句意：可是你时间不多了。请在为时太晚之前作出决定。 before在……之前。