请翻到课本的第50页。

Please turn to page 50 in your ___text.

教材的正文部分需要仔细阅读，而插图只是辅助理解。

You should focus on the ___text in the textbook, while the illustrations are just for reference.

我刚收到朋友发来的一条短信。

I just received a ___text from my friend.

记得到家时给我发个短信。

Remember to ___text me when you get home.