Listen! I hear someone________ the door.
—Is that your best friend Simon?—No, it _______ be him. He flew to Hong Kong yesterday.
—Have you found the information about Columbus?—Not yet, but I’ve found a website ________ gives an introduction to Columbus. It’s be very ________.
— Are you going to borrow a dictionary or a magazine?— ______.
—Excuse me, could you tell me ___________?—There’s an e-shop on the third floor. You can make it there.
Many fantastic photos __________ during my last visit to Beijing.