)—Are the keys yellow?— .A、Yes, it is B、No, they aren’t C、Yes, she is
Oh, it ___so nice. What beautiful music it is!
—Someone is knocking at the door. Is it Ann?—It ________ be her. She is giving a performance at the theater now.
—Must we clean the room at once?—No,you ________.You can do it after school.
—May I play computer games now,Mom?—No,you ________ finish your homework first.(2013,临沂)
Mum,what are you cooking?It __ __ so sweet.