The rivers will become dirtier and dirtier un...

The rivers will become dirtier and dirtier unless we take action to protect them.

A. take measures

B. take care

C. take advice

九年级英语单项填空中等难度题查看答案及解析

The rivers will become dirtier and dirtier 　　　 we take action to protect them.

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

九年级英语单项填空中等难度题查看答案及解析

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

A. since　　　　　　　　　　　 B. if

C. until　　　　　　　　　　　　 D. unless

九年级英语单项填空中等难度题查看答案及解析

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

A. since　　 B. if

C. until　　 D. unless

九年级英语单选题中等难度题查看答案及解析

The rivers will become dirtier and dirtier _______ we take action to protect them.

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

九年级英语单项填空中等难度题查看答案及解析

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

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

九年级英语单选题中等难度题查看答案及解析

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

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

九年级英语单项填空中等难度题查看答案及解析

The rivers will become dirtier and dirtier________ we take action to protect them.

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

九年级英语单项填空中等难度题查看答案及解析

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

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

九年级英语单项填空简单题查看答案及解析

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

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

九年级英语单项填空中等难度题查看答案及解析