Four of the sentences below contain mistakes. Find the mistakes and correct them.

1. This silk fabric is the best quality we produce.

2. Following the fire, many people have been affected by smoke than we had originally thought.

3. Pollution of the ground is most serious in area A than in area B.

4. Please wear ear protection because it's noisier here than in the other areas.

5. That was the loudest explosion I've ever heard.

6. These chemicals should be kept in good containers than those.

7. Sending the goods by air is certainly the most quick but it's also the most expensive.

UNIT 16

MEASURING INSTRUMENTS

LEAD-IN

Match the measuring instruments to their names.

A	B	C	D	E	F
Thermometer	Radiometer	Scale	Watch	Altimeter	Sundial

2. What do we use scales, thermometers, speedometers, clocks for? What other measuring instruments do you know? What are they used for?