Помогите пожалуйста.Complete the text using the prepositions at,for,through,after,up,in.

This means we all have to look after ourselves.When we lose some things, we shouldn't get angry but just look for them trying to find them.If we don't understand some words people use, we should look them up in encyclopaedias.Look at your friend and say how wonderful he is. Look through your little sister copybook and say she is a good child.She will certainly be one.