The doctor will not perform the operation it is absolutely necessary.A. when B. if C. for D. unless 查看更多

 

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The doctor will not perform the operation ___ it is absolutely necessary.

A. when               B. if                  C. for                  D. unless

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The doctor will not perform the operation ___ it is absolutely necessary.

A. when               B. if                  C. for                  D. unless

查看答案和解析>>

The doctor will not perform the operation ___ it is absolutely necessary.

A. when               B. if                  C. for                  D. unless

查看答案和解析>>

The doctor will not perform the operation ___ it is absolutely necessary.

A. when               B. if                  C. for                  D. unless

查看答案和解析>>

The doctor will not perform the operation ___ it is absolutely necessary.

A. when               B. if                  C. for                  D. unless

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