—Are those books?—Yes, ____.
—Hey, Jack. You ________ on the phone just now. But you weren’t here and the man left a phone number.—Oh? I was in the library.
—Are these books ________? —No, they are not mine. They belong to ________.
_____ news! Our class will go to Beijing for a _____ visit this spring.
―Did you see Mr. Li when you were in France?―No, when I ______, he ______ to Canada.
His sister wanted to have him _____ the radio, but he had had it _____ already.