I’m terribly sorry to have kept you waiting so long, but it’ll still be some time _________ Tony gets back.

Who does that shop assistant think he is? He behaves _______ he owned the store.

The fire started on the second floor and it wasn't long ______ the whole building was burned down.

----Dad, can I go out to play basketball now ?
----- Sorry, you can’t ______you haven’t finished your homework.

Just wait here, ______ you can hang around for a while. Your turn is half an hour away.

________ Mr. Smith was the last man I wanted to see, I did all in my power to help him.

People around the country were excited __________ the astronauts came back to the earth safely.

My partner wants to keep the company small _____ I’d like to expand it.

I felt bad _________ I talked about my unlucky experience to the public.

________they visited the Science Museum，they showed great interest in everything they saw.