III. Writing exercises:

Exercise 1. Complete the sentences with the suggested words:

solely; especially; incandescent; unlike; that; of; just.

But ______ ordinary ______ bulbs, they don't have a filament ______ will burn out, and they don't get ______ hot. They are illuminated ______ by the movement of electrons in a semiconductor material, and they last ______ as long as a standard transistor.

Exercise 2. Fill in the table with words and expressions from the text:

	parts	systems	process
Example: this arrangement conducts			electricity in only one direction
a diode comprises
the semiconductor material is returned
free electrons from the N-type material fill

Exercise 3. Compose a story on one of the topics (up to 100 words):

“Light Emitting Diodes”

“Semiconductor Devices”

“Conductor Material”