Difficult in practice, this new technique hasn’t been applied. A.operated B. to be operated C. operating D. to operate 题目和参考答案——青夏教育精英家教网—

题目内容

Difficult _____ in practice, this new technique hasn’t been applied.

A.operated B. to be operated C. operating D. to operate

【答案】

【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。

考点：考查非谓语动词的用法。

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