根据句义，用括号内所给词的适当形式填空。
小题1: The old should be spoken to ______(polite).
小题2:My family lives in the ______(center) part of the city.
小题3:He is too ______(care) to pass the final exam.
小题4: Poetry is a beautiful way to express ______(think) and feelings.
小题5: Children’s ______(expect) ideas often surprise the adults.