Days later, my brother called to say he was all right, but ________ say where he was. 

---Can you drive a car? --- No, I ________. I’m not old enough to get a license.

I’m going to Europe on vacation together with John if I _______ find the money.

Sir, you_______ be sitting in this chair! It is just for women with children and old people only.

—Oh, my God！Our teacher is so mean!—Calm down, my friend.Even though she is tough  sometimes, she ________ be nice if you really work hard.