How to create enough jobs for the laid-off workers is a(n)________problem for which there is no simple solution.
It has been proved _______ violence on television has a bad effect on children.
Mr Smith suggested the problem worth paying attention to ________ at the meeting.
As you know, there are a few formalities to be _____ before you enter a foreign country.
We are bound to solve the present severe problem, ________ we act intelligently and promptly.
— David, how is your new job?— ________ the salary, it’s not bad.