Question

In our classroom, the pupils work in groups, ______ helps them to learn to co-operate, to share and to develop leadership skill.

1. A.
   which
2. B.
   that
3. C.
   who
4. D.
   what

Answer 1

A
考查非限制性定语从句中关系词的选择，故排除B、D两项，先行词是前面的整个句子。