摘要： 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
查看习题详情和答案>>The doctor will not perform the operation ___ it is absolutely necessary.
A. when B. if C. for D. unless
查看习题详情和答案>>The doctor will not perform the operation ___ it is absolutely necessary.
A. when B. if C. for D. unless
查看习题详情和答案>>