完成句子：(共6小题；每小题1.5分，满分9分)
比起写信来，他更喜欢发电子邮件。
He prefers  ____________________________________________________ letters.
我想知道他们彼此相爱多久了。
I wonder how long _________________________________________ .
如果你看看墙报的话，你就会发现有好几篇文章是以诗歌的形式写成的。
If you have a look at the wall newspaper, you will find that quite a few articles _____________ __________________ a poem.
  他的成绩已经远远超出我的想象。
His achievements __________________________________________my imagination.
据说东北虎的生活很值得近距离观察。
It is said that the life of tigers in North China ________________________________.
这些老照片常常使我想起30年前无锡的样子。
The old photos often ________________________________________ thirty years ago.