I don't know ______.

    A. how old he is      B. when will he leave       C. where does he come from

 Mr. Brown wants to know _____ you will go hiking or not.

    A. when             B. where                 C. whether

There is ______ for you if you put your heart into it.      

    A. nothing easy       B. something important     C. nothing difficult

 Could you give me _______ to drink?

    --Sure. Here you are.

    A. something         B. nothing               C. everything

--Jane, I succeeded _______ the first place in the English competition.

   --Congratulations !

    A. to win            B. in winning             C. in catching

--Where is Tom? Do you know?

    --I think he ______ to the teachers' office.

    A. goes            B. has been                C. has gone

--I think Tom has made many friends in China.

   --_______.

    A. So I do.         B. So he has.               C. So has he.

--Why don't you come and have supper with me?

   --Thanks, but I have ________ had mine.

   A. ever.             B. yet                    C. already

-- _______ the population of the U.S.A. in 2005?

   -- It ______ about 296 million.

   A. What is; is         B. What was; was         C. How many was; is

--How long have you worked here?

   -- ______ 1989.

   A. In                B. For                  C. Since