—Are these buses? —Yes, A. it is B .they are C. these are.
Miss Lin ____ a lot of work for the poor area for about 10 years.
My friend John called and ____me to his party just now.
—I didn’t see you when I went to your office yesterday afternoon. Where were you?—I ____ a meeting in the meeting room.
She raised her voice to make everybody in the room ____ her clearly.
— ____ you sing the English song?— Yes, I can.