1 is 改are
2 改成Germany
3 a piece ofpaper
4 sheep sheep的复数还是sheep
5 homework
6 a piece of good news 或者 直接将a 去掉
7 years
8 are this
9 people
10 maths 是数学的意思 are改成is
11 work 改成 job
12 a 去掉
13 women
14 the 去掉
15 much
16 were
17 bottle 后加上 of
18 Teachers’ Day
19 road 改为way
20 times