If the green light isn’t on a minute.A. waitB. waitsC. will waitD. waiting

问题补充：

If the green light isn’t on, a minute.

A. wait

B. waits

C. will wait

D. waiting

答案：

(答案→)A. wait

B. waits

C. will wait

D. waiting

解析：句意：如果绿灯没有亮的话，就等一等。从句意可知此句为祈使句，祈使句用动词原形开头，故选A