1. By 5 :30  yesterday afternoon he         (finish) writing the laboratory report.
2. As soon as he came into the office, he        (shake) hands with every one of us.
 3. You must try your best to stop him         (make) the same mistake again.  
4. The law of gravity        (discover) by Isaac Newton about 350 years ago.  
5. If the wild animals can't find enough food,  they        (die)or have to leave their habitat soon.
6. The Great Wall as well as the Palace Museum        (attract)lots of tourists from abroad every year.
 7. The dictionary is very        (help) to me.
8. Who is         (popular) teacher in your school?
9. I will go to the park if it        (not rain)tomorrow.
10. She spent half an hour        (do) the work yester day.

1.They will be back in ten days.（对画线部分提问）
________________________they be back?
2.His mother feels a bit cold.（对画线部分提问）
________________his mother feel?
3.Please take good care of the cat for me, (改为同义句)
Please________________the cat ________ for me.
4.They had an accident last Sunday.（改为同义句）
An accident________________ them last Sunday
5.I spent half an hour walking to school yesterday.（对画线部分提问）
________________did 'you spent walking to school yester-day?
6.We'd better get to school early.（改为否定句）
We'd________________get to school early．

用所给单词的适当形式填空。

根据句意及首字母提示完成单词。