There are two particles for asking questions in Chinese - 呢 and 嗎.
呢 is used for turning statements into queries. For example:
你幾歲呢?你在哪裡呢?
嗎 is used for turning statements into yes or no questions. For example:
你可以聽到我嗎?你看得到嗎?
Let's practice what we have learnt.
Fill in the blank.
你吃了嗎?
Fill in the blank.
你吃什麼呢?