Seeing their son playing computer games all day, theparents don’t know ______ it.

By 2025, when the number of consumers worldwide has reached 4.2 billion, people with high income will be, for the first time, more than_______ struggling to meet basic needs.

opinions on the schedule, we finally reached on agreement.

Ever since their quarrel, there has been an unpleasant in the office.

It is not how much we do but howmuch love we put into what we do______benefits our workmost.