一Look! The man standing there is Mr. Smith．

—It_________be Mr. Smith．He has gone to England．

A．may         B．would         C．mustn’t         D．can’t

Mr．White is a businessman．He works in a ________．

1. A.
   hospital
2. B.
   company
3. C.
   school
4. D.
   farm

一Look! How dirty the river is!

一It        clean before the factory was built nearby．

A．used to be    B．will be                 C．has been         D．is

Mr．White is showing them ________ their school．

1. A.
   at
2. B.
   in
3. C.
   around
4. D.
   with

Mr．White is our maths teacher．This sentence me．a(chǎn)ns：Mr．White's job is________maths．

1. A.
   teaching our
2. B.
   teach us
3. C.
   to teach our
4. D.
   to teach us