lock 

Lock up all the doors before you go out.

test

There is only another test.

Tidy

Tidy the room up. 

touch 
You might get in touch with him.

a packet of

He bought a packet of cigarettes(香烟).

in a way

In a way, that is what they are.

power station

It is the world’s biggest power station.

washing machine

I like my new washing machine.

switch off

Switch off the light before you leave.

air conditioner

The air conditioner was just what he needed.