We stop ___________ when our teacher comes in.A. playing B. to play C. play
Half of the books ________easy for the students to read.
The cat climbs into the sitting-room _______the open window.
— ________does it ________to drive to the train station! —Half an hour.
—Why _________Beijing Duck? —Good idea. Let’s go.
—Your uncle will come to see you this weekend, dear son. —_____________.