the workers were made to walk by the boss for over ten hours
a new sweater was bought for her by his parents last week .
a lot of trees are planted by them on the hill every spring
Wasn't it told to you by them?
I wasn't invited by Mille to take part in his birthday party
a lot of information can be stored in the computer by us.
几个单词你打错了!我改过来了!