1. 请阅读下面短文，根据短文内容将方框中A-E五个句子填入文中空缺处，使短文内容完整、正确。

    Think about this question: what would it be like if there was no other way to get around and we could only use our feet?  Also, we would spend a lot of time on the way before we got somewhere. So we really need to thank all those modes of transportation (交通方式(.

     The earliest boats were canoes(独木舟). Later there were sailing boats(帆船), but they could only be used in one direction.  

In the 19^th century, some modes of transportation that we know today came out, such as the bike, the train and the subway.  As it got easier to travel, people wanted to get to places faster. In the early 20^th century, the first plane in the world came out. By the 1970s, many families in the UK had a car.

     They all make our traveling easier and faster and help us see this world better.

A. In today's world, we have many modes of transportation. B. If that was true, we would make our feet very tired. C. If the wind blew in another direction, people had to try hard to make the boats move. D. In 1863 the world's earliest subway opened in London. E. Boats are maybe the earliest mode of transportation.