—What qualities does a person need to become an astronaut?—He ________be knowledgeable，independent and creative.

--How about the film last night?  ---We _________ expect a better one. This is the best one that has impressed us that much.

Persons under 18 _____ not be employed in night work in the US.

This book _______ be Tom’s. Look! His name is on the cover.

---Excuse me, may I take the magazine away? ---No, you ______. You ______ only read it here.