What’s harder in college chemistry or physiology???

chemistry

Explanation:

physiology may not be obvious if you're just looking at your body as a collection of organs. ... With a basic understanding of chemistry, you can understand why your organs function the way they do and how the systems of your body work together.

i believe it is

1. 저는 사과를 머거요.

2. 너는 자야지.

3. 재석는 앉어 있었다.