3.30托福独立写作机经

21. School teachers have found that this year more and more students copy homework from others, which one of the following choices is the best way to reduce this phenomenon? 1. parents shoud supervise their childrens study and homework and sigh their names to prove that their children do not cheat. 2. teachers should punish those children who copy homework from others. 3. teachers should assign homework that can not be easily copied.

22.

23.

24.

25.

26.

27.

28.

29.

30.