You should …the batteries fully before using the smartphones.

• apply

• display

• store    

• charge

This device … people to communicate by using voice commands.

• allows   

• makes

• applies  

• lets

. … cars can work with little human control.

• Driver  

• Driven

• Driverless

• Non-driver

“…” means "made by humans'.

• valuable  

• useful

• artificial    

• helpful

. … is not part of a computer.

• Hardware  

• Software  

• Process  

• RAM

This device is not … for children.

• suitable        

• valuable   

• various  

• artificial

We do not like … on animals.

• experiences 

• experiments   

• exercises

• expressions

They … a new camera in the classroom to monitor the activities.

• applied    

• installed

• displayed

• stored

A … is a small computer that we can carry to work or school easily.

• smartphone   

• laptop  

• hardware

• software

Many inventions are a result of careful ….

• experiences   

• experiments

• exercises     

• explorations