选择适当的单词填空。
1. The _______ (direct, direction) of wind is always changing in my hometown.
2. It is _______ (simply, simple) a phone number.
3. It's midnight and everything is ______ (sleep, sleepy) and quiet.
4. He is a great _______ (poet, poem, poetry) in ancient China.
5. His _______ (interrupt, interruption) stopped our meeting.
6. The _______ (expect, unexpected) knock on the door surprised every one.
