Close your book, please.

请把书合上。

《新英汉大辞典》

Close your book and write one word or two on a piece of paper.

合上你的书，在纸上写下一两个字。

youdao

Open your pencil box, close your book and carry your bag.

打开你的铅笔盒，合上你的书然后背上你的书包。

youdao

But I feel that they stayed quite close to the book.

但是我觉得它们已经很接近原著了。

哈利•波特的人气 - SpeakingMax英语口语达人

Mr Weeks did not have sales in mind when he decided to close his book with a discussion of lay ethnography.

ECONOMIST: But who's complaining?

Barack Obama will close the book on the old politics of race and gender and group against group and straight against gay.

CNN: Transcript: Edward Kennedy's DNC speech

In fact, the only thing likely to seriously vex you is the foreboding cliff-hanger Rowling leaves you to contemplate as you close the book.

CNN: Books - Review: Gladly drinking from Rowling's 'Goblet of Fire'