--- Whose Chinese vase is it?--- I have no idea, but I’m pretty sure it _______ the old lady.
11.There is no light on--- they _______ be at home.
10.--- Hello, John here, can I speak to Mary , please? ---_____________.
9._____ makes this shop different is that it offers more personal services.
8.Although this_______ sound like a simple task, great care is needed.
7.Please ______ your sister to bring the ticket for the concert.