—The haze will be a serious problem ____ we t...

—The haze will be a serious problem ____ we take action to solve it .

—Sure it is. I think everyone should do something for it.

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

Many people believe we will face serious problems ______we take action to change the way we live.

A. but　　 B. though　　 C. unless　　 D. until

九年级英语单项填空中等难度题查看答案及解析

—What a heavy haze (霾)! The air pollution is terrible now.

—It will be worse ______ we take action to protect the environment.

A.if B.unless C.because D.although

九年级英语单选题中等难度题查看答案及解析

We should take actions to reduce the haze（雾霾）because it does harm ________ our health.

A. with B. to C. on D. for

九年级英语单选题中等难度题查看答案及解析

---The air pollution is terrible.

--- It will be worse 　　　　 we take action to protect the environment.

A. if　　　　　　　　 B. unless　　　　　　　 C. so　　　　　　　　 D. though

九年级英语单项填空中等难度题查看答案及解析

---The air pollution is terrible.

---It will be worse _______ we take action to protect the environment.

A.　 if　　　　　　 B. unless

C. until　　　　　 D. When

九年级英语单项填空简单题查看答案及解析

--The air pollution is terrible.

--It will be worse_______ we take action to protect the environment.

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

九年级英语单项填空简单题查看答案及解析

- The air pollution is terrible.　　

- It will be worse ________ we take action to protect the environment.

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

九年级英语单项填空简单题查看答案及解析

- The air pollution is terrible.

- It will be worse ________ we take action to protect the environment.

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

九年级英语单项填空简单题查看答案及解析

—The air pollution is terrible.

— It will be worse ________ we take action to protect the environment.

A. if　　　　　 　　　　　　 B. unless

C. until　　　　 　　　　　 D. when

九年级英语单项填空困难题查看答案及解析