Each country has many good people who take care (1)… others.

• interest

• who

• understand

• of

They read books to the people in these places, (2)….they just visit these people and play games with them or listen to their problems.

• or

• when

• understand

• interest

Other young volunteers go and work in the homes of people (3)….are sick or old. They paint, clean up, or repair their houses, and do the shopping.

• of

• or

• when

• who

Some of these clubs show movies or hold short trips to the mountains, the beaches, museums, or other places of (4)…

• understand

• interest

• of

• or

Most of these clubs use a lot of students as volunteers because they are young enough to (5)… the problems of younger boys and girls.

• understand

• when

• who

• or

Your stove, for instance, will tell you (1)… your food is cooked and ready to eat.

• knowledge

• all

• when

• track

People already use them to keep (2)…of pets and farm animals.

• all

• also

• track

• contact

Future RFID chips will store information about (3)…. items in your cabinets.

• knowledge

• contact

• all

• track

It will (4)… adapt to your preferences. Your house will learn about your likes and dislikes.

• also

• all

• track

• when

It will then use that (5)…to control the environment

• knowledge

• contact

• all

• when