Lucy’s colour ________blue because she likes to be the leader, so it __________red.   

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

—How do you find the health club?—I          it. Everyone is saying its management is going from bad to worse.

No person _______ carry a mobile phone into the examination room during the national college Entrance Examinations. 

Susan’s parents bought a large house with a swimming pool. It ______be very expensive.