根据句意和汉语注释，写出单词的正确形式。
Reading history books can not only improve our             (知识) of the past but also make us think.
The elderly should be spoken to             (礼貌地).
Deaf people can             (交流) with each other with sign language.
I haven’t been to that island             (也).
He lost his bike and was ____________(惩罚) by his parents