根据材料,回答下面的题目: In Britain, people have different attitudes to the police. Most people generally ______26______themand the job they do-although there are certain people who do not believe that the police______ 27______have the power that do. What does a policeman actually do? It is not______28______job to describe. After all, a policeman hasa number of jobs in ______ 29______ . In Britain, he might be in the Traffic Police and ______ 30 ______most of histime______ 31 ______up and down main roads and motorways. A traffic policeman has to keep the traffic ______32______and help when there is an accident. A policeman has to help keep the ______ 33______ , too. If there is a fight or some other disturbance,we ______ 34 ______the police to come and restore order. And they often have to ______ 35 ______situation at greatrisk to their own ______ 36______. We expect the police to solve crimes, of course, so an ordinary policeman,______ 37 ______ he is not a detective, will often have to help ______ 38 ______and arrest criminals.And ______ 39 ______ do we call when there is an emergency-an air crash, a ______ 40 ______ , a road accident,or a robbery? We call the police.41a policeman has to be42to face any unpleasant e-mergency that may happen in the ______ 43 ______world. The police do an absolutely necessary job, they do it ______ 44 ______ well and I support them, but I do not envy policemen, I do not think that I could ______ 45 ______do the job of a policeman.

A. should
B. would
C. could
D. must