The UN has warned that, natural systems like forests and wetlands disappear , mankind is losing the services they provide such as protection from extreme weather.
A. while
B. once
C. when
D. as
The UN has warned that, natural systems like forests and wetlands disappear , mankind is
答案:2 悬赏:50 手机版
解决时间 2021-04-06 04:44
- 提问者网友：爱了却不能说
- 2021-04-05 10:33
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- 五星知识达人网友：你可爱的野爹
- 2021-04-05 11:39
A. whileB. onceC. when(答案→)D. as解析：可联系答.案.网客服索取。
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- 1楼网友：胯下狙击手
- 2021-04-05 12:31
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