【题目】Passengers _____ talk to the driver while the bus is moving, because it will take his focus off the road.
A. would not B. must not
C. may not D. need not
在线课程【答案】B
【解析】考查情态动词。句意：当公共汽车开动时，乘客不得与司机交谈，因为这将把他的注意力从路上转移开。A. would not不会；B. must not禁止，不允许；C. may not可能不会；D. need not不必。此处表示“禁止，不允许”，故选B。