010.
Good morning, this is Helen Green with this edition of Morning Hours on the air. Now if you've got nothing to do today, why not go to the ease part of the city and get digging. That's the message from No. 1 Senior High School, which is organizing a tree planting event near East Mountain.
No. 1 Senior High School is a member of the environmental group of the city. In order to improve the environmental education of its students and get more people organized, the school is planning to plant a total of 1,400 trees paid by the government over the next few days.
They are hoping to plant half of them today and they are looking for volunteers to come along and help. No experience is neccessary, as there will be experts to give directions and the equipment will be provided. But if you have any tree planting tools, please do bring them along in case of a lot of people come and want to start digging at the same time.
Every one is welcome to come along anytime between 10 and 4 o'clock. Because you will be working in the mountains, I don't think you need my advice of what sort of shoes or clothes you have to wear. And of course, gloves will be essential to protect your hands if you're actually doing the digging. So it could be really a nice day out for all the families. Enjoy your day.

答案解析：
(1) 正确答案为B。根据this is Helen Green with this edition of Morning Hours on the air.这是海伦·格林为您带来的Morning Hours广播节目。可知，这是一个广播通知，因此B项正确。
(2) 正确答案为A。根据In order to improve the environmental education of its students and get more people organized为了加强对学生的环境教育，组织起更多的人，可知，这项活动的目的是加强人们保护环境的意识，因此A项正确。
(3) 正确答案为A。根据plant a total of 1,400 trees一共要种1400棵树，而今天要hoping to plant half of them种一半，即700棵，因此A项正确。
(4) 正确答案为C。根据And of course, gloves will be essential to protect your hands当然，为了保护手，手套是必需的。可知，广播者建议志愿者去种树的时候带上手套，因此C项正确。