单句改错题：
【小题1】Your family is very kind. I'll never forget the favor you've done me.
【小题2】When and where to build the new school haven't been decided.
【小题3】Three quarters of the land is covered with green grass while the rest are covered withpine trees.
【小题4】Not even one of the hundred students who took the test have passed.
【小题5】On each side of the street stands a lot of trees.
【小题6】There seem to be a knife and fork on the table.
【小题7】The students in our school each has known the meaning of WTO.
【小题8】The number of people who own cars are increasing.
【小题9】Such people as he is to be punished.
【小题10】It were Tom and John who played a trick on the old man.