根据句意用所给词的适当形式填空（10分）

小题1:Mr. Green uses a lot of games in his ___________.(teach )

小题2:My uncle _________(dead) three years ago.

小题3:She _______(forget) to turn off the light when she left the room.

小题4:We can see many_______________( farm) working on the farm..

小题5:France is in _______________(west) Europe.

小题6:We can learn many_____________things about the tower if we listen to the guide carefully.(interest)

小题7:The cat is so small, and we should take good__________(careful) of it.

小题8:My mother often encourages me ____________(study) hard and enter a famous university.

小题9:The statue(雕像)is in the______________(central) of the park.

小题10:The rich man donated( 捐赠 )a lot of money. The___________(receive) are from the poor countryside.

在供电系统中，必须使用继电保护装置，为什么？