Please open your book to lesson 11.

请翻到第十一课。

youdao

Open your book, please.

请翻开书。

youdao

Stand up, please. Sit down, please. Open your book. Close your book.

请起立。请坐下。打开书。关上书。

youdao

Open/ Close your book, please.

请打开（合上）你的书。

youdao

Open / close your book, please.

翻开/合上你的书。

youdao

Open / close your book, please.

翻开/合上你的书。

youdao