—Which sport is the most popular in the US? —It’s hard to say．It largely ______ what you mean by “popular”?

The meal over, the managers went back to the meeting room to ______ their discussion.

Every minute should be made full ___ of ___ our lessons well.

The survey shows that a large number of teenagers are ________ cigarettes nowadays.

Mother told Jim to ______ the milk until it boiled and then turn off the gas.