四、阅读理解(共15小题;每小题2分，计30分)
阅读下列内容，从每小题所给的四个选项中选出一个最佳答案。
(A)
Motor cars were first made in England just before 1900. The parts for the bodies and engines were hand-made and the cars were built from these. One at a time. This took a long time, and the cars cost a lot of money. Then a quicker and cheaper way of making cars was found. Instead of making all the parts at their own works, some car factories asked other factories to make some of them. All the parts were then fitted together in the car factories.
Modern car-making factoriess are so large that each one is really a lot of factories close together. Each workshop makes some parts. The pieces of a car body are joined together by welders(电焊工) . All the bits and pieces that make up each car are collected and put ready for the assembly line(装配线) , where they are fitted together.
51. The first motor cars were probably made by______.
A. Europeans B. the Whites C. the Blacks D. the English
52. A quicker and cheaper way of making motor cars was______.
A. found in 1900
B. that all parts of motor cars were no longer made by hand
C. the one that they should be made in a large car factories
D. the different parts of motor cars were produced in different works
53."Modern car-making factories" means "______".
A. the factories which modern cars are making at
B. the factories where cars are made by modern workers
C. the new factories at which cars are being made
D. the factories where modern cars are made
，我们将会及时处理。
