When ____ help, you should say “thank you.” or “It is kind of you”.

I want to send Mary a card. She may ________ it in a few days ________ post.

Would you come to our party tomorrow, Della?— I’m afraid I can’t afford the time, but thank you for the invitation _______

You can only be sure of _______ you have at present;you cannot be sure of something _______ you might get in the future

Interest is as ________ to learning as the ability tounderstand, even more so.