Question

The teachers always complain about         the         children in class.

1. A.
   to teach, tired
2. B.
   teaching, tired
3. C.
   teaching, tiring
4. D.
   to teach, tiring

Answer 1

B
complain about doing sth是固定搭配；勞累的孩子應(yīng)用tired來修飾。