It is recommended that the project ________ not be started until all the preparations have been made.

It’s nearly eight o’clock. I must hang up and get down to work. My boss________ be here at any moment.

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

I think that's unlikely to happen, but if that ______ occur, both America's and China's interest would be severely damaged.

A: Listen! Is it Linda singing in the next room? B: No, it __________ be her. She is still in Shanghai.