动词用法：Could you open the window, please?（请开窗户。）
形容词用法：The store is open until 10 pm.（商店营业到晚上10点。）
动词用法：Could you close the window, please?（请关窗户。）
形容词用法：I live in a house close to the park. （我住在一个靠近公园的房子里。）
I have some close friends. （我有一些亲密的朋友。）
形容词用法：The door is closed.（门是关着的。）
The restaurant is closed on Sundays.（这家餐厅周日不营业。）
closed也可以作为过去分词，表示一个动作已经完成。例如：The store is closed now.（商店现在已经关门了。）
Fill in the blanks with open, close or closed.
I had to __________ the book to see if there was anything written on the last page.
The children were happy to see the playground was finally __________.
The office will be __________ for the holiday weekend.
The cat was sitting on the windowsill watching the __________ window with interest.
It's a good idea to __________ the door when you leave the house.
The store had to __________ early because of the snowstorm.
I always keep my eyes __________ when I walk alone at night.
I always hang out with my __________ friends.
The students were disappointed to find out that the library was __________ for renovations.
The circus performers were practicing their tricks in the __________ tent.