______ no need to take any medicine ______ you are ill. "A. It is…unless B. There is…unless C. It is…unless D. There is…until "

______ no need to take any medicine ______ you are ill. "A. It is…unless B. There is…unless
C. It is…unless D. There is…until
"

出自：西安交通大学--英语三

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