1 . 每本书后都有一个人，此人身后是一个族群，这个族群后是自然和社会环境。如果一本书要传达这整个信息，我们必须要知道所有的这些。
Behind every book is a man, behind the man is the race, and ______   ______ ______ are the social and natural environments. We must know all these, if the book is to speak its whole message.

2 . 可怕的熔岩雨砸下来了，落在空荡荡的街道上、广场上，到处都是，落在波涛汹涌的大海里，发出阵阵巨响。
Over the empty streets—over the forum— far and wide —with __________ __________ __________ __________ in the stormy sea—fell that awful shower!

3 . 火山岩忽明忽暗，讲述着过去火山几度喷发的故事 ，这本来可以警告这座城里的人，灾难即将到来！
Its ashy rocks,now dark,now light,told a story of past eruptions that   ________ ________ ________ the city what was to come!

7 . ________（作为回复）these issues, several writers agree that taking regular exercise is most effective when it comes to anxiety. （根据汉语提示完成句子）