反垄断政策措施主要是从( )两方面来进行的。

A．调整产业结构和干预企业行为

B．干预市场结构和干预企业行为

C．干预市场行为和干预企业行为

D．干预市场行为和调整产业结构

There _____ be any difficulty about passing the road test since you have practised a lot in the driving school. [ ]

A. mustn't

B. shan't

C. shouldn't

D. needn't