语法填空。阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填人一个适当的 词或使用括号中词语的正确形式填空。 Bill Gates 1_____ (be) very successful and become very rich. He is very generous but 2_____ has he got his money? He has done this by making sure that no one else will be able to compete with his software. His software is not the best 3_____ it is used most widely in the world. When he sees what 4_____ (need), he makes a program and produces 5_____ quicker than anybody else. That way he gets 6_____ large part of the software market. Then he works 7_____ improving the software later. He tries hard to stop others making better software. In 1995 the government tried 8_____ (make) things fairer for people like me. The government wanted to make Microsoft into two companies so that neither of them was so strong 9_____ so rich. This meant that they could not stop somebody else making new software. I always wonder how he could get so rich so quickly. Has he done it 10_____ fair means? Or has he done it by being a computer bully.