括号中的动词使用的连续或简单的现在时态.添加其他的单词是必要的.

1.
The doorbell_is ringing____.(ring)
I__know____.I___hear___it.(know,hear)
2 Your dinner is on the table.
I__know_____.I____see___it.It ___smells____ good.(know,see,smell)
3 This car__belongs___to me.(belong)
I__don't believe___you.(not believe)
4 I_don't understand____her.What__does she mean___?(not understand,mean)
I__think___that she__means___'Be quiet!' (think,mean)
5 Look!She_is smiling____.(smile)
Yes.She_smiles____all the time.(smile)
6 Why is your case so heavy?
It_contains____a lot of books.(contain)