根据句意和汉语注释，在答题卷标有题号的横线上，写出单词的正确形式。
China is a great country with a long __________ (历史).
This bike is one of my__________ (同班同学).
Can you show me how to use the __________ (新式的) computer.
I feel __________ (的确) sorry about the bad news.
Students enjoy doing after-school __________ (活动) .