1. (2020·重庆A) 阅读下列材料，从A、B. C、D四个选项中选出最佳答案。

1. （1） Volunteers will teach children________.

   A . how to protect the sea B . how to write a letter C . how to speak Chinese D . how to play the piano
3. （2） Volunteers need to start work on______.

   A . Sunday B . Monday C . Friday D . Saturday
5. （3） Volunteers can_______.

   A . leave at any time B . have a good pay C . do some business D . stay in a beach room