求翻译：　　We arrived at the hill at eight o'clock . The teacher asked each of us to plant at least six trees . Then we started digging ， planting and watering . We all worked so hard that we could finish our tasks ahead of tim e . Among us ， Wang Lin ， our monitor set a good example for us . Though he was ill ， he worked harde是什么意思？

待解决 悬赏分：1 - 离问题结束还有