pollute proper six powerful they |
51．Schools should do something to help students protect ．
52．If a river is ，farmers can't use the water for their crops．
53．The Internet is more than books．It is influencing our lives a lot．
54．The students who are good at writing can always use words ．
55．Children usually attend a primary school at the age of in China．
As we all know，China's deep﹣sea exploration has already （进入）a new period.
The programme Drive less，cycle more will reduce pollution and make streets
much （安全的）.
China's women's soccer team （赢得）a ticket to this summer's Tokyo Olympics in April.
﹣ I went to your house after work yesterday but you were not in.
﹣ Oh，I （walk） my dog outside.
Chinese Women's Football Team （play） in the coming Tokyo Olympics.