If I _____, I will go to the tea party this evening. [ ]

Whose pencil box is this?—It _____ be Tom’s. It has his name on it.

Which drink do you like ____________, coffee or tea?

You must keep the door _______ when you leave your room. — But I want to get the fresh air. I think I can keep the window ________ instead.

Can you play the guitar?—________.