题目内容

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

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

查看答案

搜索结果不匹配？点我反馈

更多问题

The headmaster hurried to the concert hall only _ the speaker _.

A. to find; left
B. to find; had gone
C. finding; left
D. finding; had gone

The dog and the boy ___ are in the picture are very lovely.

A. who
B. that
C. which
D. /

There are many tall trees on _______side of the street.

A. both
B. all
C. neither
D. either

以下观点不正确的是

A. 使用价值是商品的自然属性
B. 价值是商品的社会属性
C. 交换价值的基础是使用价值
D. 交换价值的基础是价值