单词拼写。根据下列句子及所给单词的首字母，在答题卷上按题号写出各单词的完全形式（每空限填一词）。
One of the rules is that all the students must pay a________ to their teachers in class.
A k________ person is a person who knows a lot about everything.
My mother p________ coffee to tea. But I like tea a lot.
I won’t go to his birthday party u________ I am invited.
The old man lives alone and aren’t happy these days. Let’s go to see him and c________ him up.
He told his mother he needed a mobile phone, but she gave a d________ ear.
When he got to school, he found the classroom was e________. He realized it was Sunday.
There are many a________ and modern things on display in the museum.
---W________ backpack is it?
--- I don’t know. Let’s ask them and find the owner.
My bike is broken. I’ll get it r________ this weekend.