123. Which of the following is a bad habit when changing lanes?

A. Turning on the indicator in advance

B. Observing closely before changing a lane

C. Change lanes at will

D. Not obstructing the passing of other normally moving vehicles

Answer：C

Previous question: 122. When driving in rain and encountering pedestrians with umbrellas or wearing raincoats, what should be done by motor vehicle drivers in order to yield?

Next question: 124. What influence does smoking have upon driving?

2026年摩托车科目四英文版题库共345题，你可以免费查看前50题，完整版题库请添加微信购买：

The English version of the 2026 motorcycle subject 4 question bank has a total of 345 questions. You can view the top 50 questions for free. Please add WeChat to purchase the complete version of the question bank.

科目四试题

When rescuing a wounded person in coma, it is necessary to take warm-keeping measures to prevent heat loss.
What is the meaning of this sign?
When rescuers enter the scene to rescue the wounded after harmful gas leakage caused by traffic accidents, they must wear air respirators or cover their mouth and nose with wet towels.
When a motor vehicle temporarily stops in fog, which lamp should be turned on?
When putting out a fire disaster that gives out erosive steam or poisonous gas, the firefighters should wear gas masks and other related protective articles and should operate from the windward side.
When a motor vehicle passes over an overflowing bridge, what should the driver do after stopping and observing closely?
What is the meaning of this sign?
What is the meaning of this sign?
When a motor vehicle encounters an accident, the driver should pay attention to whether there is fuel leakage, pipeline rupture, so as avoid accidents.
When using splints, sticks or tree branches to keep the unexposed bones in position, it is necessary that these things should exceed the upper and lower joints of the wound.
What is the meaning of this sign?
What is the meaning of this sign?
When following other vehicles on the uphill section of a mountain road, what should the driver do if the vehicle in front stops?
What is the meaning of this sign?
What is the meaning of this sign?
How to ensure safe driving at night?