Put your socks on _______ you put on your shoes.
before
We should go shopping _______ it starts raining.
before
Lock the door _______ you leave.
before
Telephones were invented _______ the internet.
before
The internet was created _______ computers.
after
I alway feel sleepy _______ I wake up.
when / after
I dream _______ I sleep.
when
You shouldn't talk _______ you are taking an exam.
when
Suitcases with wheels were invented _______ airplanes.
after
