Take care! Accidents _________ happen along this part of the road.

—I wonder why Suzan looks worried today.—I’m not sure, but she ________a small accident driving here.

---Look at that girl! Is that Susan?---No , it _______ be her. She has gone back to her hometown.

—Will you stay for some more days? —Sorry, I_____. My mother called to ask me to go back at once. 

— May I take the magazine out of the reading room?— No, you can’t. You ______ read it here. It’s the rule.