Now lots of teenagers spend a lot of time playing computer games.— Yes. Teachers and their parents should prevent them ___________ too much.

Those injured inthe earthquake were either________in local hospitals or sent to hospitals inneighboring cities.

Is there any particular soup you would like to have —_______ you select is all right with me.

With time ______ by, my grandmother has much more silver hair.

how to operate the electronic computer, ______