Friendship can’t be ________in terms of money but money is an effective means to ______ how strong the friendship is. 

The problem, according to the experts, is _______ we should do with the salty land.

—Why is he feeling down today?—Because the suggestion he________has been turned down.

Those young men were ____ by the police with causing a disturbance in the neighborhood. 

It is already 10 o’clock. I wonder how it ______ that she was two hours later on such a short trip.