Question

This is an important examination.All the students of class X know it (join into single sentence using a noun clause)​

Answer 1

Answer:

All the students of class X know that it is an important examination

Explanation:

Mark it as brainliest

Answer 2

Answer:

all the students of class X should know that this is an important examination

Explanation:

Here the clause’ This is an important examination' can actually act as the object of the verb know. And since it acts as the object of a verb, it is a noun clause.