He tried all the ways he could think of （protect） himself against all possible dangers．
The two （president） wives also took part in the chairty show．
Robinson Crusoe（《鲁滨逊漂流记》） by Daniel Defoe is （wide） read by teenagers in our city．
You look very tired． Why not （take） a rest？
Come on，Sam． Believe in （you）．You can work out the problem on your own．