21．上周日天氣晴朗。我和我妹妹一起去看了一場有趣的電影。
Last Sunday it sunny.I an film with my sister.

22．dirty， and， streets， rubbish， makes， the， messy （．）

23．Nancy （come） from the US.

24．--邁克上周末和他朋友去釣魚了嗎？--不，他沒有．
-- Mikehis friends last weekend？
--， he．

25．閱讀并選擇正確答案
Mark Twain was a great American writer．He was very busy ，so he often forget something．
One day he went to a city by train．When he was in a train ，the conductor asked him for his ticket．but he couldn't find the ticket．The conductor knew Mark Twain．She said："Show me your ticket on your way back．If you can't find it ，it doesn't matter．"
"Oh ，no ，" said Mark Twain． "I must find the ticket．If I can't find it ，how can I know where I'm going？ "

（1）Mark Twain was a ．
A．doctor
B．writer
C．conductor
（2）Mark Twain went to the city ．
A．by plane
B．by car
C．by train
（3）When Mark Twain was in the train，the conductor asked him for ．
A．his works
B．the ticket
C．some food
（4）Mark Twain didn't show his ticket because he couldn't it ，
A．buy
B．bring
C．find
（5）Mark Twain had to find the ticket ，because ．
A．without it he doesn't know where he's going．
B．he wanted to use the ticket to buy some food
C．he wanted to go home

26．We did shopping on the Internet yesterday． （對劃線部分疑問）
youyesterday？

27．You want some cakes．（改為一般疑問句并做否定回答）

28．根據(jù)上下文填空。
A：What（1） you do last Saturday，Su Hai？
B：I（2）our grandparents（3）Su Yang.
A：What did you buy for（4）？
B：We（5）them some flowers and fruit.They（6）very happy.We all（7）a good time.

29．He wrote letters twenty years ago.（改為一般疑問句）
he letters twenty years ago？

30．The Earth is our home．On Earth，there are rivers，seas and lakes．There are hills and mountains．There are plants and animals．Many years ago，the air was clean．The rivers and lakes were clean．There were a lot of fish．There were a lot of trees and animals too．
Now the Earth is dirty．The air is dirty．The rivers and lakes are dirty．There are not many fish in the water．There are not many trees on Earth．People cut down too many trees for wood．There are not many animals either．People kill them for meat and fur．
The Earth is our home．Our home is dirty．We should make it clean again．We should keep it clean．
（1）The Earth was clean many years ago．
（2）There were not many trees on Earth long long ago．
（3）There are not many animals on Earth now．
（4）People do not like animals and trees．
（5）We cannot make the Earth clean again．