Choose the best answer（根据短文内容，选择最恰当的答案）

We Need Volunteers(志愿者)!

Clean Guhua Park!

We need five people to help clean up Guhua Park. We need you to collect rubbish. 

If you are free(空闲的) for four hours this weekend, come and join us!

Tel:021-57164323

Email:guhuapark(@126. com

Teach Music!

We need three volunteers to teach music in Children's Hospital. You need to be good at singing and dancing. And you should be friendly and kind.

If you are free for two hours every weekend, join us!

Tel:021-64931990

Email:lovechildren(@sina. com

Help old people!

We need four volunteers to help old people at Xinxin nursing home. You should talk with old people and wash clothes for them. 

If you are free for three hours on November 30, come and join us!

Tel:021-57191151

Emai:homelove(@163. com