The most diffcult one in book 2 is lesson nine 在第二册书中，最难的是第九课。
2.
She went on reading lesson 9 for half an hour 第九课她连续不断地读了半小时。
3.
My friends like sports but i don ' t 第九课我的朋友喜欢运动，但是我不喜欢。
4.
The father let his son have a rest before moving to lesson nine 那位爸爸让儿子在进行第九课之前休息休息。
5.
Memorize a short poem ( at least 14 lines long ) by lecture 9 . prove somehow that you know it ; you choose the poem and the mode of proof 在第九课前记住一首短诗（长度至少有14行） 。证明你是如何理解该诗的。自选诗及证明方式。
