—Whose pencil sharpener is this? —It_________  mine  .Mine is here.I think it belongs to          .

—Have you checked the engine? —Yes, I did twice; there ______ be anything wrong with the car.

—Must I finish the book today?—Yes, you ________, but you ________ finish it now. Have a rest.

--“Where is Tom?”--“He hasn’t come to school today, I think he ______be ill.”

She doesn’t ______ a new dictionary because she bought _____ a week ago.