1、How many kinds of law-breaking acts are displayed in flash 4?
A、One
B、Two
C、Three
D、Four
Answer：C
2、This sign warns that the section ahead is under traffic monitoring.
A、Right
B、Wrong
Answer：A
3、what should motor vehicle drivers do under the circumstances shown in the flash?
A、Reduce speed or stop to yield
B、Sound the horn to warn the pedestrians to yield
C、Pass before the pedestrians
D、Immediately change to another lane to bypass the pedestrians
Answer：A
4、When a motor vehicle accidentally hits the guardrail of a highway, an effective protective measure is to turn dramatically in the opposite direction.
A、Right
B、Wrong
Answer：B
5、The sign on the right indicates that the speed limit is 50km/hour.
A、Right
B、Wrong
Answer：B
6、When the vehicle behind gives a notice of overtaking at night, the vehicle in front should not yield blindly.
A、Right
B、Wrong
Answer：A
7、Matches, sulfur and red phosphorus belong to which of the following dangerous chemicals?
A、Explosives
B、Oxidizing materials
C、Self-igniting articles
D、Inflammable solid materials
Answer：D
8、When there is a braking failure on a downhill road, if there is no other alternative, the driver may rub the vehicle body against the rocks and trees on roadside to force the vehicle to slow down and stop.
A、Right
B、Wrong
Answer：A
9、When driving in a strong wind, drivers should abruptly turn the steering wheel to return to the original direction if they feel the vehicle deviates horizontally due to a strong gale.
A、Right
B、Wrong
Answer：B
10、Motor vehicles are prohibited from driving straight or turning left in this situation.
A、Right
B、Wrong
Answer：A
11、When there is a braking failure on a downhill road, if there is no favorable terrain or opportunity to stop the vehicle, the driver should drop gear by one position or two positions, and control the speed by taking advantage of the braking role of the engine.
A、Right
B、Wrong
Answer：A
12、The motor vehicle should speed up and pass rapidly under this situation.
A、Right
B、Wrong
Answer：B
13、When a motor vehicle accidentally hits a guardrail of a highway, the driver should stabilize and adjust the steering wheel properly, and refrain from turning the steering wheel drastically.
A、Right
B、Wrong
Answer：A
14、Before a motor vehicle enters a tunnel, the driver should adjust the speed in accordance with the indication of the traffic sign at the entrance of the tunnel.
A、Right
B、Wrong
Answer：A
15、When approaching the turning point of a road, in which of the following ways will motor vehicle drivers easily cause a traffic accident?
A、Driving ahead by occupying the opposite lane
B、Turning the steering wheel quickly when passing through the curve
C、Not reducing speed until driving onto the curve
D、Driving by the right side
Answer：ABC
16、When approaching another vehicle at night, why should the driver alternate between high-and-low-beam at a distance more than 150 meters?
A、Warn each other before passing
B、Driving habit
C、Easy to observe the situation ahead from either side
D、Courtesy
Answer：C
17、The sign on the right side warns of an emergency lane 500 meters ahead.
A、Right
B、Wrong
Answer：A
18、What's the meaning of the sign on the right?
A、Drive on the right side of the road ahead
B、No entry ahead
C、One-way road ahead
D、Watch for the right-hand intersection ahead
Answer：C
19、What is the intersection ahead indicated by the right sign?
A、T-shaped intersection
B、Y-shaped intersection
C、Cross-shaped intersection
D、Roundabout
Answer：D
20、Drivers may cross these lane-dividing lines to change lanes in the same direction.
A、Right
B、Wrong
Answer：B