Here are some reference sentences to help you get started:

1. 这是Morgan的鸟。 (Zhè shì Morgan de niǎo.)
2. 这是Nia的狗。 (Zhè shì Nia de gǒu.)
3. 那是Ceri的猫。 (Nà shì Ceri de māo.)
4. 那是Ceri的鱼。 (Nà shì Ceri de yú.)

Remember, there's no single correct answer, so feel free to be creative with your sentences!

After creating your sentences, it's time to work on your pronunciation. Listen to the provided audio and repeat the sentences a few times to get a good grasp of the tones and sounds. Practice makes perfect, so keep it up!