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digital
Many people use computers.
Computers _____ ________
by _______ _________.
The volunteers planted many trees in the garden last year.
Trees _____ _______ in the
garden ____ the volunteers last years.
are used
many people
were planted
by
Can you try ？
Who invented it?
When and where was it developed?
The First Plane
3a A. Listen to the conversations and number the following pictures.
2
3
1
3a B. Listen again and complete the table .
Invention
Item
laptop
cell phone
digital camera
Material
Usage
Year
country
plastic