a lot of trees cut down ,this area has become desertA.With B.Because C.As D.Since
问题描述：
a lot of trees cut down ,this area has become desert
A.With B.Because C.As D.Since
答
A With
正确的说法包括
? a lot of trees cut down ,this area has become desert. (A)
? a lot of trees were cut down ,this area has become desert. (B,C)
? a lot of trees had been cut down ,this area has become desert. (B,C,D)
答
D 后面是完成时
答
A
答
A.With
独立主格结构，with+名词+过去分词
答
因为在逗号前的部分不是一个句子,所以整个为一个简单句子.这样就可以把BCD都排除了.逗号后面的部分已经有了完整的主谓结构,组成句子,因此,逗号前边的为一个伴随状语,用with.