A. Make sentences using these words;

SCIENCE / QUIETLY / HURT / TANK / LAST

Science(as a school subjects) has a lot of experiments.

In class time, students should stay quietly.

=> Another way: Your sentence is okay and this is another way of saying it. Student should stay quiet during class time.

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If I hurt, I have to go to the hospital.

If I'm hurt, I have to go to the hospital.​

Tanks have two means, "a place that puts water etc,​" and "a car that sometimes uses in wars."

Tanks have two definitions , "a container where you water etc," and "a vehicle that sometimes uses in wars."

This sentence is the last sentence.​