My work is interesting but ______ dangerous.

----_______ does it take your mother to make breakfast every day?
----About 15 minutes.

--- The sports shoes must be Linda’s.
--- No, they _____ be. They’re too small for her.

---What are the people in Korea supposed to do when they meet for the first time?
--- They are supposed to _______.

---______ do you go hiking?
--- Once a week.

--- _____ did you tell him about the news?   ---By ____ an e-mail.

--- Could you tell me _____ ?
--- Because she likes her students very much.

---_____you _____ out the problem, Sam?
--- Not yet, but I’m going to.

--- I don’t think teenagers should drive cars.
--- _______. They aren’t serious enough.