A major part of safe driving is driving at the right speed. But what is the "right" speed? Is it 20 miles per hour, or 45, or 60? That question may be hard to answer. On some city streets and in heavy traffic, 20 miles per hour could be too fast, even if it's within the posted speed limit. On an interstate highway, 45 miles per hour could be too slow. Of course, a good driver must follow the speed limit, but he must also use good judgment. The "right speed will vary depending on the number of cars, the road surface and its condition, and the driver's visibility.
The general theme of this passage is that a good driver

Determine which of the choices best solves the problem shown in the first picture and then mark the corresponding choice on your answer sheet. The problem is presented in the first drawing and the remaining four drawings are possible solutions.

What chemical can be used to detect blood, even if it's been wiped from a surface?

On modern automobile engines, what's the purpose of the intake manifold?

Kinetic energy is