Please write a notice for the students and ______.

1. A.
   put it up 　
2. B.
   put up it　
3. C.
   put it on 　
4. D.
   put on it

At minus 130℃，a living cell can be ____________for a thousand years．

　　A．spared

　　B．protected

　　C．preserved

　　D．developed

 It was not until liberation that _________ to his hometown.　 A. did he return 　 B. was he returned

　 C. he did return 　 D. he returned

The new machine，if _________ properly，will work at least ten years.

　 A. use 　 B. using

　 C. being used 　 D. used

—What do you think of the manager of your company?

　　　　—Oh, he is ________ manager who’s pleasant to work with.

　　It’s ________ pleasure to work with him.

　　A. the; a　　　　B. a; a　　　　　　C. a; the　　　　　D. 不填; a