存在许多常见食物过敏，例如坚果和贝类。

There are many common food allergies, ___such ___as nuts and shellfish.

旅游套餐涵盖了基本费用，例如交通和酒店住宿。

The tour package covers basic costs, ___such ___as transportation and hotel stays.

我生日时收到了实用的礼物，例如一个笔记本和一支笔。

For my birthday, I received useful gifts, ___such ___as a notebook and a pen.