精英家教网 > 初中英语 > 题目详情

【题目】The rivers will become dirtier and dirtier ______ we take action to protect them.

A. since B. if C. until D. unless

【答案】D

【解析】since由于,自从……以来;if 是否,如果; until直到;unless除非,如果不。句意:如果我们不采取措施保护他们,这些河流会越来越脏。结合语境可知选D

练习册系列答案
相关习题

科目:初中英语 来源: 题型:

【题目】______ is the last to leave should close the windows.

A. However B. Whatever C. Wherever D. Whoever

查看答案和解析>>

科目:初中英语 来源: 题型:

【题目】—I'd love to do something different this weekend, Pam.

—All right. What about _____ picnic?

A. a B. an C. the D. 不填

查看答案和解析>>

科目:初中英语 来源: 题型:

【题目】Mary is really organized girl.

Yes. She can keep all her things in good order.

A. a; a B. an; the C. an; / D. an; a

查看答案和解析>>

科目:初中英语 来源: 题型:

【题目】How many children are there on the playground?

A. 5 B. 7 C. 10

查看答案和解析>>

科目:初中英语 来源: 题型:

【题目】When was the telephone invented?

A. In 1876, B. In 1885. C. In 1927.

查看答案和解析>>

科目:初中英语 来源: 题型:

【题目】________ fun the Dragon Boat Festival is!

A. What B. It C. How D. It’s

查看答案和解析>>

科目:初中英语 来源: 题型:

【题目】What is Amy doing all day?

A. Practising the violin. B. Singing. C. Dancing.

查看答案和解析>>

科目:初中英语 来源: 题型:

【题目】…Do you like this movie?

一Yes,it's the one I’ve ever seen.

A.better B.best C.good D.well

查看答案和解析>>

同步练习册答案