I’ll keep his address _____ I need it

Excuse me, sir. Would you please the total cost of the trip— All right, I will make it at once.

No one taught ____ English. He learned it _______. — He is so clever.

two readable books, which do you think is______ one for me to read

To our _________, Hawking didn’t worry about his problems in the slightest, _________, he just face the problems.