Look out!The traffic is fast we can’t cross t...

Look out!The traffic is　　　 fast　　　 we can’t cross the street now.

A.too;to B.enough;to C.so;that D.such;that

九年级英语单选题中等难度题查看答案及解析

Look out！The cars are running ______ fast______ we can't cross the street now.

A. too；to　　 B. so；that　　 C. such；that　　 D. enough；to

九年级英语单选题困难题查看答案及解析

--Boys and girls , wait for a moment !

--OK. We can’t cross the street ________the traffic lights are green.

A. until　　　　　　　　 B. after　　　　　　　　 C. while　　　　　　　　　 D. for

九年级英语单项填空简单题查看答案及解析

There is a lot of traffic in this city, _____ look both ways before crossing the street.

A．so 　　　　　　　　　　 B．and

C．but 　　　　　　　　　 D．for

九年级英语单项填空中等难度题查看答案及解析

There is a lot of traffic in this city, _____ look both ways before crossing the street.

A．so B．and C．but D．for

九年级英语单项填空中等难度题查看答案及解析

— Amanda, hurry up! The bus is coming!

— Oh, no. We mustn’t cross the street 　　　　 the traffic lights turn green.

A. if　         　　 B. after

C. until         D. because

九年级英语单项填空简单题查看答案及解析

---Lisa ,hurry up !The bus　 is　 coming .

--Oh ,no . We______cross the　 street until the traffic　 lights turn　 green .

A. mustn’t 　　　　 B. needn’t 　　 　　 　 C. should

九年级英语单项填空简单题查看答案及解析

—Lily, hurry up! The bus is coming.

—Oh, no, we _______ cross the street until the traffic lights turn green.

A. mustn’t        　　 B. may not        　　

C. needn’t        　　 D. don’t have to

九年级英语单项填空中等难度题查看答案及解析

—Hurry up. The bus is coming.

—Oh, no. We mustn’t cross the street ________ the traffic lights are green.

A.after B.since C.until

九年级英语单选题简单题查看答案及解析

If we are driving a car or crossing a street, we will stop when the traffic lights turn red. Why do we use red rather than other colors?

As we know, scattering (散射) happens when light goes through the air. For the same media, if the wavelength (波长) is long, the scattering will be short. If the wavelength is short, then the scattering will be long.

Of all light we can see red has the longest wavelength, so the scattering is the weakest. That means the red light travels far. In fact, it travels farther on rainy days.

Using the red light can help drivers in farther areas see the lights. It helps drivers slow down or stop in time. If drivers don’t see the red light until they are close, they may not be able to stop the car in time. An accident may happen. Red can also excite people. We can act more quickly when we see the color red.

In a word, red light helps drivers stop in time and help prevent accidents.

1.______ has the longest wavelength of all light we can see.

A. Red               B. Green           C. Yellow          D. Black

2.Red light travels farther on ______ days.

A. windy             B. sunny           C. rainy         D. cloudy

3.Red can make people act more quickly because ____________.

A. red can make people happier              B. the scattering of red is very short

C. the scattering of red is very long           D. red can make people more excited

4.The underlined word “prevent” means ______ in Chinese.

A.逃避               B. 防止            C. 处理         D. 检查

5.The passage mainly tells us ____________.

A. why accidents happen                     B. how the red light travels

C. why we use red traffic lights               D. how to stop in time at traffic lights

九年级英语阅读理解中等难度题查看答案及解析