At the United Nations Climate Change Conference the UN Secretary General points out that

问题补充：

At the United Nations Climate Change Conference, the UN Secretary General points out that, , the climate situation will get worse and worse.

A. if not dealing with properly

B. unless dealing with properly

C. if properly dealt with

D. unless properly dealt with

答案：

A. if not dealing with properly

B. unless dealing with properly

C. if properly dealt with

(答案→)D. unless properly dealt with

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