21.  "I said it the first time in Putonghua.

22.  The second time I said it in Guangzhouhua.

23.  At this time, I look back this year.

24.  After a long time, the eror couldn't catch the cheats .

25.  So I spent too time in doing the maths homework and reviewed the other lessons.

26.  After filled in the form and did the homework, I began to reviewed , but the time was to late, I forgot to recite the words.

27.  I must spend much time to recite the words.

28.  It not only stores information but also calculates numbers millions of times as fast as a scientist done .

29.  On the other hand, being a student of senior middle school, I think we should spend much time listening to the English broadcast.

30.  So very day, I never fail to watch it on time.