Accidents are caused; they don't just【C1】______. The reason may be【C2】______to see: an ove

r-loaded tray, a shelf out of reach, or a patch of【C3】______on the road. But, more often than not, there is a【C4】______of events leading up to a disastrous accident, tiredness or just bad temper -- that shows what the accident really is, a ,sort of attack【C5】______oneself.

Road accidents,【C6】______, happen frequently after a family quarrel, and we all know people who are accident-prone,【C7】______often at odds with(与……相争)themselves and the world that they seem to cause accidents for themselves and others.

Yet, this should not【C8】______us think that accidents happen to other people. By【C9】______, an accident is something you cannot predict or【C10】______, and the idea which used to be current(流行的),【C11】______the majority of road accidents are caused by the minority of criminally careless drivers【C12】______not supported by insurance statistics. These show that most accidents【C13】______motorists in a moment of carelessness or thoughtlessness.

It is not always clear,【C14】______, what tort of conditions make people more【C15】______to have an accident. For instance, the law requires all factories to【C16】______safety measures and most companies have safety committees to make sure the regulations are【C17】______, but【C18】______every day in Britain, some fifty thousand men and women are absent from work due to an accident. These accidents are【C19】______the result of human error or misjudgment -- noise and fatigue, boredom or worry are possible factors which【C20】______to this.

【C1】

A．occur

B．happen

C．take place

D．come about