--- Isn’t that Jessica’s brother over there? --- No, it _______ be him. I’m sure he doesn’t wear glasses. A. can’t B. must not C won’t D may not
___Mr. Chen is waiting outside to speak to you. He appears to be quite ___ important person.
Suan! Where have you been? You have no idea ___ worried I was !
___ my opinion, Americans eat too much meat.
Most Saturday evenings they cook meals ___ open fire outside.
_____ in the queue for half an hour,Tom suddenly realized that he had left his wallet at home.