How can people make use of sea water
They make use of it by （） the salt.

A．He applies for this job to earn more money.
B．He majored in computer in the university.
C．He knows little about computer.
D．He has just graduated from a university.

A．Ask for a three-day leave.
B．Go out with his friend.
C．Watch films at home.
D．Go to visit Bob.