（1）、were areThere( )some small trees in our school thirteen years ago.There（ ）lots of big trees now.(2）、has got have gotAmy( )a new red T-shirt.I( )a new white T-shirt.(3)、on byTwenty years ago,we went to work( ）．Now we go to work（ ）car

1.were are
2.has got have got
3.? by

were
are
has got
have got
on
by

were,因为句中有个ago,表示过去时
are,因为句中有个now,表示现在时
has got,因为amy是主语,即第三人称做主语,动词用单数形式
have got,因为I是主语,即第一人称做主语,动词用原型
on,work on表示是短语,继续工作的意思
by,by car表示通过轿车的途径（也就是坐车）

（1）、were are
There( were )some small trees in our school thirteen years ago.
There（are ）lots of big trees now.
(2）、has got have got
Amy(has got )a new red T-shirt.
I( have got)a new white T-shirt.
(3)、on by
Twenty years ago, we went to work( on）walk．
Now we go to work（ by）car