问题: 英语问题
The scientists and technicians overcame a lot of
difficulty _____ the personal computer.
A.they have developing
B.having developing
C.they had developed
D.which has to develop
请给出正确答案并解释,谢谢
解答:
句子中为避免出现两个谓语,把一部分弄成定语从句.
估计是这个搭配: sb ...have difficulty (in ) doing sth ...
选A.
翻译一下:科学家和技术人员克服了为发展私人电脑所遇到的很多困难.
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