— How about buying Sam a mobile phone? After all, he isn’t a boy any more. —I think it necessary, for we sometimes want to make sure if he _______ home for dinner.
I have no idea ______ the journalist could have got his information from.
The banker was found in a remote village after ______ his office last Thursday.
I’m sure you will do better in the test because you ______ so hard this year.
You’d be exposed to a lot ______ pollution if you moved to a town with pure water and air.
Some young people these days just ______ go out of their homes to contact the real world.