People have planted a great many trees in order to ________ wind and sand in the desert. [ ]

If you had brought your swimming suit with you, we ___________ swimming in the lake now.

advises the thief______ into prison.

A model or an experiment in a science class can help us see thingswhich would_______ remain hidden.

es of ancient Chinese coins are ________ in anexhibition held in Nanjing, where a variety of ancient currencies wereunveiled.