很多青少年感到孤独，好象没有人理解他们以及他们正在经历的变化。

Many teenagers feel lonely,             ____________ no one understands them and the changes they are __________________.

_________ everyone is here, let’s begin the discussion.

  A. Then          B. Now          C. Later          D. After

________ the manager has arrived, we can begin our discussion right away.

A. If                  B. When              C. Now that                   D. Even if

_______ turning off the television, he went to bed.

      A. Unless   B. Upon     C. If        D. Because

(  ) The lady likes to take some novels to read if she goes to see a doctor _______ he is too busy.

A. so that   B. as if   C. in order   D. in case

(  ) The sad news came all of sudden _______ his parents were drowned in the pond.

A. which   B. as   C.  when   D. that

She promised _____ he had enough money, she would marry him.

       A. that    B. that if C. whether      D. if that

You can’t camp          you like these days. Many natural areas are now under protection.

A. whichever                   B. wherever                    C. what                    D. when

_______ surprises us most is that she doesn’t even know _______ the difference between the two opinions lies．

       A． It; which B． What; what    C． What; where   D． That; where

-------What do you think of the music teacher?

    -------_____________she is an elegant lady, she can be extremely difficult to work with．

     A． While        B． When         C． Even if        D． As