You ______ stop when the traffic light is red.
A. can B. could C. may D. must
九年级英语单项填空简单题
You ______ stop when the traffic light is red.
A. can B. could C. may D. must
九年级英语单项填空简单题查看答案及解析
You ________ stop when the traffic light turns red.
A. can B. had better C. need D. must
九年级英语单项填空困难题查看答案及解析
You________stop when the traffic lights turn red.
A. can’t B. may C. must D. needn’t
九年级英语单选题困难题查看答案及解析
Cars, buses, bikes and people stop when the traffic lights are red.
A．can B．may C．must
九年级英语单项填空中等难度题查看答案及解析
You _________ drive on when the traffic light is red.
A. can’t B. needn’t
C. mustn’t D. may not
九年级英语单项填空简单题查看答案及解析
Cars and buses ___________stop when the traffic lights turn red.
A. can B. need
C. may D. must
九年级英语单项填空中等难度题查看答案及解析
Cars and buses ___________stop when the traffic lights turn red.
A. can B. need C. may D. must
九年级英语单项填空简单题查看答案及解析
When the traffic lights turn red, we will stop driving a car or crossing a street. Why is red used for traffic lights instead of other colors?
As we know, scattering (散射) happens when light goes through the air. For the same media(媒质), if the wavelength is long, the scattering will be short. If the wavelength is short, then the scattering will be long.
Of all lights 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 sec the lights. It helps drivers stow down or stop in lime. 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 lights help drivers stop in time and help prevent accidents.
1. When the traffic lights turn ______, we will stop driving a car.
A. red B green C. yellow
2.According to the passage, the scattering of the red light is the _______.
A. longest b. weakest C. farthest
3. The underlined word "wavelength" means________ in Chinese.
A.波浪 B.光波 C.波长
4. What can the red light help drivers do?
A. It can help drivers in farther areas see the lights.
b. It can help drivers slow down or stop in time.
C. A and b
5.Which of the following is the best title?
A. Why do accidents happen
b. How does the red light travel
C. Why do we use red traffic lights
九年级英语阅读理解中等难度题查看答案及解析
When traffic lights are red, we stop and wait.
A. may B. can C. must D. might
九年级英语单选题简单题查看答案及解析
You ________ cross the road when the traffic lights are red.
A. can B. must
C. mustn’t D. needn’t
九年级英语单项填空简单题查看答案及解析