根据中文意思完成句子。
你今晚来我家帮我学数学好吗？
Will you please come to my house and __________ me _________ my maths?
听到这个好消息，我激动得不能入睡。
I was __________ excited __________ sleep when I heard the good news.
北京以许多旅游胜地而闻名。
Beijing _________ many places of interest in the world.
你最好交卷前再检查一下。
You _________ again before you hand in your test papers.
保护环境是我们的责任。
_________ our environment.