When this boy was asked to copy down the sentence ten times, he did nothing but _____deeply with a blank look on his face.

You can’t predict everything. Often things don’t ________ as you expect.

The hotline_________ be very busy，but keep trying and you’ll get through．

They have been told that if they want to build a highway between the two towns, they should first try to____ how much it is going to cost.

Since drug abusers have difficulty＿the addiction, support groups where they can talk about their struggles and find new ways to manage in the world are often needed.