How to write two sentences in senior one?

Just kidding, make the following sentences:

1. He wrote "good morning" as "early listing" in his oral English exercise book, which is really a joke.

Running in the park yesterday, I accidentally fell down and made a joke.

Xiaoming wrote "addition" as "subtraction" in the math exam. As a result, the teacher gave him a big red cross and he made a big joke.