The road _______ 20 kilometers in length leads to a beautiful village. 

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

Before we end this program, let's take a          at the sports news briefly．

Mrs. Smith finds it hard to clear up the mess, as her children are always ____ whenever she tries to.

  ----Why don’t you ______ to a more sensible method? ----Well, I’m thinking about it.