Of all the books on the shelf,        is of any use for improving our practical skills of survival in the competitive world.

I help him　　friendship.

When they had finished playing, the children were made to _______ all the toys they had taken out.

 With the aim of getting high marks, most Chinese students were ________ lacking creativity.

It is generally believed that constant reading and comprehending can ______ our mental ability of comprehension while physical exercise can help build up our body.