Life is full of chances and challenges. For students, if we don’t study hard, ___, we will fall ___ other students. At first, I didn’t know ____ the word “ exam” meant. Later, I knew an exam was a ____ of competition. In competitions, there were always ___ and losers. As I grew up, I got to know competitions well. In one’s life, there must be competitions, so people could ____.
Each time I saw children ___ games, and heard their laughter, I ___ I were that age again. However, I remembered my parents’ words——You must work very hard ____ have a good future. So I ___ up my pen and began to study hard again.
I was still not ____ what competitions really meant. One day, I was ____ an English-speaking competition. When I went to the stage, I saw other students looking at me kindly. I suddenly knew what the competition was. It was not as cruel ___ my teacher and parents told me. In fact, competitions were important and necessary.
I learned a lot ____ what I experienced. Now I understand _15_ about the world. Competitions are important for us all.

A．because of B．sooner or later C．at the same time D．as soon as

A．behind B．off C．over D．after

A．how B．when C．what D．where

A．few B．member C．kind D．number

A．winners B．students C．soldiers D．athletes

A．appreciate B．improve C．combine D．important

A．to play B．playing C．played D．plays

A．donated B．hope C．remember D．wished

A．so that B．in order to C．for D．as for

A．picked B．dropped C．threw D．took

A．agree B．sure C．know D．believe

A．joining B．entered C．come D．taking part in

A．as B．than C．between D．though

A．above B．under C．among D．from

A．less B．more C．special D．good