用括号内所给词的适当形式填空（每空不限一词）。
小题1:If you ___________(not be) careful enough in the exam, you will not get a good grade.
小题2:Our modern times need more and more ___________ (hero) for us to learn from.
小题3:Good habits are good for the ___________ (develop) of us teenagers.
小题4:The 30th Olympic Games ___________ (hold) in London this summer.
小题5:— Look! He is shouting at his mother.
— Why is he so ___________ (polite)?
小题6:The group of students are discussing the question ___________ (active) to come up with the answer.
小题7:The Three-D film Titanic is the ___________ (wonderful) film I have ever seen.
小题8:The OBIS doctor is training the local doctors how___________ (deal) with the blindness.
小题9:Though my grandfather is in his ___________ (seventy), he has got a QQ number.
小题10:Lei Feng devoted himself to___________ (work) for the people all his life.