I. 单项选择

1. ― Why not ask Bob to join us in the school trip?

  ― I can’t tell if he’s able to. He’s always ______ with his work.

    A. careful                  B. familiar           

    C. casual                   D. busy

2. ― Your room is very dirty. You should keep it ______.

  ― OK. I’ll sweep it right away.

   A. clean     B. dry     C. quiet     D. warm

3. --- How is Helen in the new school?

  --- She is doing very well. There is ______ to worry about.

   A. something            B. anything

   C. nothing                D. everything

4. When the Greens moved into the house last week, ______ was at sixes and   sevens (乱七八糟), so they did a big cleaning.

    A. something            B. everything

    C. anything              D. nothing