must have been a long trip. — Yeah, it _____ us a whole week to get there.

Look! Such heavy traffic!— I doubt _________ or not I can get to school ontime.

Please pass me the cartoon book _________ has a Mickey Mouse on the cover.

Can I help you, sir?—I’m afraid you can’t. I have my students’ papers________.

Look, _________ those boys are playing __________ in the club!