Question

He was praised by his teacher ________ he had done．

1. A.
   for that
2. B.
   for what
3. C.
   by what
4. D.
   because that

Answer 1

B
he had done需要宾语，所以应选含有what的选项；be praised for是固定搭配，for表示原因，所以答案为B项。若选D项，则应用because of what he had done。