Chinese pair

1. The unification of North China is to (South China) what (division) is to failed ships and vehicles, what (books) is to clean reading and health, what (filth) is to honesty and glory to disease, and what (hypocrisy) is to shame.

2. Simple, simple, simple

Premier Zhou's life has always been simple. War of Resistance against Japanese Aggression was born in Yan 'an. He often lives in a (simple) cave. In Beijing after liberation, the office was extremely (rudimentary).

3. Dense and precise

The skull is very (dense)

4. Fill in the brackets with antonyms to form words

(Different) Curve (Same) Work (this) goes up (that) goes down.