—The river is becoming dirtier because the st...

—The river is becoming dirtier because the steel factory has put waste into it.

—Yes. We must take action to improve the　　　　　　 .

A. condition　　 B. pollution　　 C. position　　 D. situation

九年级英语单项填空中等难度题查看答案及解析

The river has become much ______ than before because of the waste water.

A. dirty B. dirtier C. Dirtiest

九年级英语单项填空困难题查看答案及解析

The river has become much ______ than before because of the waste water from the factories.

A. dirty　　　　　　　　　 B. dirtier　　　　　　　　　 C. Dirtiest

九年级英语单项填空简单题查看答案及解析

The river has become much ______ than before because of the waste water from the factories.

A. dirty      B. dirtier   C. dirtiest

九年级英语单项填空中等难度题查看答案及解析

---___________ a big factory near the river. Where is it now?

--It has been closed because it polluted the air.

A. It used to be　　 B. There used to be

C. It is used to be　　 D. There is used to be

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 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