用所给动词的适当形式填空。(请说明为什么。谢谢！）
1.The telephone______(ring).Could you answer it,please?
2.They______(sweep)the floor half an hour ago.
3.He______(hurry)to school every morning.
4.It"s a pity.John_____(fail)his English esam yesterday.
5.Try____(not break)the glass.
6.We____(not see)Mr Green since last week.
7.Stamps are used for___(send)letters.
8.They"ve______(ride)a long way.
參考答案:rings
sweep
is hurry
fails
breaking
are not seeing
sending
ride
