改错
you still remember the day which you joined the Party?
is the boy his handwriting is the best in our class
was the meeting which importance I didnt know.
father，that has been away recently, wants to see you.
has three sons，two of them are music lovers.
you know it，he has left for America.
Li，who you met，is our English teacher.
computer center，that was opened last year，is very large.
pen which writes smoothly was given to me by my sister.
e who wants to see the film put up your hands.
e have seen the film think highlv of it.
is the way which they work.
28. I have made the same mistakes like you have.
is,so big a stone as no one can move it.
news which a war broke out in the Middle East surprised us.
参考答案：
16.改which为when。
17.改his为whose。
18.改which为whose。
19.改tllat为who，非限制性定语从句，表示人的主格时用who。
20.改two of them为two of whom
21.去掉it，因为as在此句中是关系代词，作know的宾语。
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