71.  They said that the two man were imposters and they must try hard to catch them, To their surprise the professor said it wasn't necessary, because he still kept the papers in his invention.

72.  The rule of the game is one by one to catch ball, if you continue to twice, then you failed .

73.  The teacher should occasionally find himself catching his breath with the student.

74.  He rushed out of the room and caught sight of Jack, standing in the street.

75.  When he was going to catch Jim, Jim's father, a black and large man, standed in his way and smashed his fist into Peter's face, Peter was knocked down to the ground, he hit back hard .

76.  Peter couldn't catch up Jack, he got a black eye and walked home defeated .

77.  He catch hold of wanghua on the arm and said: "Stop!

78.  For another, our science and technology have caught up with the world level.

79.  If we insist the Reform and open policy , in the future our country will catch up the other country .

80.  This is because it is neccessary to catch up with the world.