题目内容：

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