Match the first part of the sentence (1-7) with the second one (A-G)

1. The escalator system isn't nearly as good as an elevator at lifting …..

2. A pair of rotating chain loops pull a series of stairs in a constant.….

3. Escalators are one of the largest, most expensive machines.….

4. The motor and chain system are housed inside the truss, …..

5. At the top and bottom of the escalator, the tracks level off …..

6. Each step has a series of grooves in it, so it will fit together …..

7. Once an elevator is filled up, you have to wait for it to reach …..

a) ….. a metal structure extending between two floors.

b) ….. to a horizontal position, flattening the stairway.

c) ….. with the steps behind it and in front of it during this flattening.

d) ….. cycle, moving a lot of people a short distance at a good speed.

e) ….. its floor and return before anybody else can get on.

f) ….. people dozens of stories, but it is much better at moving people a short distance.

g) ….. people use on a regular basis, but they're also one of the simplest.

6. Match the words with their definitions:

escalator, traffic, staircase, motor, direction, movement, step

1. A set of stairs with its supports and side parts for holding on to.

2. The point or position towards which a person or thing moves, faces or is aimed.

3. A flat narrow surface, esp. one in a set of surfaces each higher than the one before, on which the foot is placed for climbing up and down; stair, rung of a ladder, etc.

4. A set of moving stairs in an underground railway station, a large city shop, an airport, etc.

5. A machine that changes power, especially electrical power, into movement, and is used for working other machines.

6. The act of moving or condition of being moved; the moving parts of a piece of machinery.

7. The movement of people or vehicles along roads or streets, of ships I the sea, planes in the sky, etc.