I fell asleep while working on this paper____ the computer on.[ ]

Many students don’t know how to _____ stress （压力）and become worried.— I think they can ask their teachers for help.

I don’t doubt ______ he will pass thetomorrow’s exam.

The Hotel Al Arab ______ the first and only 7-star hotel in the world was designed in the shape of a sail of 321 meters [ ]

In the past the children were made ______15hours a day.