The volunteer team (志愿者小队) did a lot of things for the community (社区). The members started helping others at an early 1 a. People 2 c them the heroes of the community.

Mr Zhou went to work by bike. But on the way, his bike was broken (坏了). He was worried. Liu Feng 3 h him repair the bike.

Mr Wang was old and weak. Zhang Mei did some 4 s for him. She also taught Mr Wang how to buy things on the internet.

Sun Peng taught Pengpeng to play basketball. At 5 f, Pengpeng could not play well and was sad. Sun Peng cheered him up (使振作). He helped Pengpeng practise basketball at the weekend.

Amelia moved to China three months ago. She tried to learn Chinese, but it was very 6 d for her. Shen Xin helped her with Chinese. She also showed Amelia around the city.

1. age
2. called
3. helped
4. shopping
5. first
6. difficult

这是首字母填空题，结合语境、固定搭配和一般过去时的语法规则逐个推导：
1. 固定搭配at an early age表示“在很小的年纪”，符合志愿者成员很早就开始帮助他人的语境，首字母为a，填age。
2. 句意为“人们称呼他们为社区的英雄”，call sb. sth.表示“称呼某人为……”，全文描述过去发生的事，用call的过去式called，首字母为c。
3. 前文提到周先生的自行车坏了，这里指刘峰帮他修车，help sb. do sth.表示“帮助某人做某事”，用help的过去式helped，首字母为h。
4. 图中是女孩帮老人拎采购的物品，固定搭配do some shopping表示“购物”，符合语境，首字母为s，填shopping。
5. 固定搭配at first表示“起初”，对应后文鹏鹏一开始篮球打得不好的描述，首字母为f，填first。
6. 句意为“她努力学习中文，但是对她来说非常困难”，difficult表示“困难的”，符合语境，首字母为d，填difficult。