Only when I left home to go to college ___ how much my mother had done for me.

______, and everything will be all right.

I don’t ________ well today．I want to go to bed early．

The only time that we _____ to do something like doing some volunteer work was in the city of Philadelphia.

Can you tell me ________ to send this postcard to New York byairmail—Let me check. Oh，it’s onedollar.