A．More and more paper is being consumed nowadays.B．Paper enables people to receive education more easily.C．The invention of paper is of great significance to man.D．Paper contributes a lot to the keeping of historical records.
A．More and more paper is being consumed nowadays.
B．Paper enables people to receive education more easily.
C．The invention of paper is of great significance to man.
D．Paper contributes a lot to the keeping of historical records.