lesson 10

An inventor must perform an ________ to test an idea.

• experiment

• genius

• invention

• laboratory

He is so smart that people call him a _________.

• wheat

• deaf

• genius

• machine

Many farmers grow _________ in large fields.

• invention

• wheat

• electricity

• laboratory

That old woman is __________, so she can't hear us calling.

• deaf

• genius

• experiment

• machine

The electric light bulb is Edison/s most famous _________.

• wheat

• electricity

• invention

• experiment

laboratory

• 
• 
• 

machine

• 
• 
• 

electricity

• 
• 
•