根据下列句子及所给汉语注释，在句子空缺处写出各单词的正确形式（每空只写一词）。
小题1:Thomas Edison _______(发明) the light bulbs.
小题2:He went into the room _______(慢地) and sat down.
小题3:You can’t solve the problems ______(除非) you do it carefully.
小题4:He has a kind ______(心) and often helps others.
小题5:Some animals, for example, elephants and koalas, live on grass and _______(树叶)
小题6:My uncle bought me an Ipad for my _____(第十二) birthday.
小题7:So far, we’ve ________(成功) in saving thousands of people in danger.