standardized college exam

[bosun]

Can anybody help me to express the following sentences more naturally in English?

1. Each high school in Korea gives different level of exam, which make it hard to test stduents' abilities more objectively

2. THerefore, Standalized university exam is necessary to evaluate students' academic ability more objectively.


3.If the standalized university cannot test students' potential abilities, we can add another kind of exam to make up for the standalized test is missing.

[RonBee]

1. Each high school in Korea gives a different examination, which make it hard to test students' abilities objectively.

2. A standardized university exam is necessary to evaluate students' academic ability objectively.

3. If the standardized university exam cannot test students' abilities, we can add another kind of exam to make up for what is missing.