Listen! Someone is knocking at the door. Who _____it be—It_____ be Tom. He phoned to visit me this evening.

The whole morning _____ the windows and the floors tomorrow.

In the face of all these difficulties, we’re not discouraged and________good spirits. [ ]

We are anxious about the spreading of H7N9,hoping it’ll ______ less threatening soon.

Why________ you always leave your dirty clothes in thebedroom