Difficult _____ in practice, this new technique hasn’t been applied.A．operatedB．
题型：不详难度：来源：
Difficult _____ in practice, this new technique hasn’t been applied.| A．operated | B．to be operated | C．operating | D．to operate |
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答案
| D |
解析
试题分析：此处相当于because it is difficult to operate in practice，省略because it is之后就变成了 difficult to operate in practice. 句意：因为这种新技术很难在实践中操作，所以它没有被应用。 |
举一反三
—The leaders are supposed to care about the sufferings of the people.
—Contrary to that, some of them act with their eyes _______ to the reality.| A．closing | B．closed | C．to close | D．being closed |
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We hurried all the way to the airport, only ______ that the flight had been cancelled because of the foggy weather.| A．being told | B．to be told | C．having told | D．to have been told |
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_______ to find the book from the library, she decided to turn to her professor for help.| A．Failed | B．To fail | C．Having failed | D．Being failed |
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Dina, for months to find a job as a waitress, finally took a position at a local advertising agency.| A．struggling | B．struggled | C．having struggled | D．to struggle |
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Be careful when you cross the road in rush hours so as to avoid by a car．| A．being knocked down | B．knocking down | | C．to be knocked down | D．to knock down |
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