短文改错

     Why are cars widely use in America? There are three reasons. I think, the first of all,

the country is very large and Americans enjoy make trips here and there. With cars they

can go everywhere. The second reason is what trains have never been as common in the

US than they are in other parts of the world. What's worse, Americans have to spend a

lot of money travels by plane. The third reason is most important one. Americans don't like

waiting forbuses or trains and even planes. They like cars because they want to travel fast

at some time to some places.

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某海运公司有两艘货船，甲船定额吨位1500吨，在报告期全年在册，乙船定额吨位800吨，在报告期中，从5月1日在册（在册245天），则该海运公司报告期货船运用情况的平均使用船舶数为：（）吨。

A.1500

B.800

C.1191

D.2037