用所给单词的适当形式填充。8%
（1）Are those _________( girl ) uncles postmen or policemen?
（2）__________( there be ) a library in your school two years ago.
（3）My grandmother lives on the _________( five ) floor.
（4）Our cars are new. ________( they ) are old.
（5）On Sundays the boys often __________( watch ) television.
（6）Where        the bird        ( fly )three days ago? To the south.
（7）Peter can________(swim) very well. Look, he ____________( swim ) in the pool.