they become dirty, the lakes are not able to clean themselves A. Once B. since C. As D Beca——青夏教育精英家教网—

摘要： they become dirty, the lakes are not able to clean themselves A. Once B. since C. As D Because

网址：http://m.1010jiajiao.com/timu3_id_3135922[举报]

________ they become dirty, the lakes are not able to clean themselves

A. Once B. Since C. As D. Because

________ they become dirty, the lakes are not able to clean themselves

A. Once 　　　 B. Since　　　　 C. As　　　　 D. Because

试题分类