1. 语法填空

The question of who invented the computer cannot be answered with a single name. Throughout history, many different people have helped in the development of this (value) machine. And many date the first important (invent) to the fourth century BC when the abacus was developed.

The fact was the first computer that could store programs (be) the 1949 Electronic Delay Storage Automatic Calculator. It (create) by Maurice Wilkes. From this point forward, many developers helped to make various types of computer.

In the early 1970s, many skilled inventors, including Bill Gates, Steve Jobs, and Stephen Wozniak, did much (develop) personal computers in the form of PCs. By the 1990s, ownership of PCs had become common as production grew (expensive) than before. Also, the development of technology, the size of these machines became smaller so that they could (easy) be used in homes.

There is no doubt that there are so many thinkers and inventors who helped to develop the computer. There are even legal battles over who should be considered as the primary inventors. As matter of fact, it was their joint efforts that led to the development of this most useful machine.