问题: start
The preject is designed in this way and once __,
nothing can be done to change it.
A starts B starting C started D having started
选什么？为什么？
解答:
The preject is designed in this way and once __, nothing can be done to change it.
A starts B starting C started D having started
正确答案:C
译文:这个工程用这种方法设计,一旦启动没有什么可以改变的.
解析:工程 和启动 之间存在被动关系,这个句子是个省略句,完整的句子为: once (it is )started,...., 所以答案选择C.
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