Stop cutting trees the earth will become worse and worse.A. andB. thenC. butD. or

问题补充：

Stop cutting trees, the earth will become worse and worse.

A. and

B. then

C. but

D. or

答案：

A. and

B. then

C. but

(答案→)D. or

解析：可联系答.案.网客服索取。