Remember ______ the book in time when you have finished _____ it .

－I’d like to help the homeless people in the earthquake. －You ________ join a volunteer group.

Excuse me, may I keep the book a little longer – Sorry. You ________ return it today.

Tom, can you tell me__ — Sorry, I don’t know.

Tom went to the stadium in a hurry, only____________ the game had been put off.