Question

Why not ________ an English language club to practice ________ English?

1. A.
   join, speaking
2. B.
   to join, speak
3. C.
   joining, speak
4. D.
   take part in, speaking

Answer 1

A
Why not…=Why don't you…，后面接动词原形；join和take part in都有“参加，加入”之意，但join指参加“某一组织”或“某些人”之中，后面不加任何介词；take part in指参加“某一活动”；practice后面接动词-ing形式。