You can only be sure of ________ you have at present; you cannot be sure of something ________ you might get in the future.
| A．that; what | B．what; / |
| C．which; that | D．/; that |
31.— Is Bob still performing?
—I am afraid not. He is said _______ the stage already as he has become an official.
A．to have left |
B．to leave | C．to have been left | D．to be left |
30.— Hello! Golden Bay Ressort! Can I help you?
— Do you have a room _____ for this weekend?
| A．present | B．handy | C．available | D．operational |
29._____ to sunlight for too much time will do harm to one’s skin.
| A．Exposed | B．Being exposed | C．Having exposed | D．To expose |
28.The police were trying to _____ the suspect’s motive of killing his wife.
| A．single out | B．catch on | C．stop off | D．figure out |
27.Influenced by the economic crisis, the rate of unemployment in big companies has risen in the last 3 months , _____ 10 percent in average.
| A．have reached | B．reaching | C．to reach | D．to be reaching |