--- Haven’t you checked the bill? ______ does $53 plus $5 service charge come to $68?--- Oh! I’m sorry, sir. Here is the change for you.
— How do you find the food here? — _______.
Elizabeth _______ a good plan of increasing sales at the meeting.
The woman ________ Mr. Brown is a professor from Beijing University.
The head teacher comes to the classroom ______ to see if the students are quiet.
I’ve been playing the piano for four hours and I am ________ it.