they become dirty, the lakes are not able to clean themselvesA. OnceB. SinceC. AsD. Becau

发布时间：2020-08-16 08:56:41


     they bee dirty, the lakes are not able to clean themselves
A. Once
B. Since
C. As
D. Because

网友回答

(答案→)A. Once
B. Since
C. As
D. Because
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