they v to help the sick people last week（根据首字母提示填空）

1、They (volunteered,自愿去做) to help the sick people last week.
他们上周自愿去给病人帮忙.
2、Try to (cheer,使振作) these unhappy children up,please?
尽量让这些不开心的孩子们高兴起来.