72.The new generation of phones has features that can be used for teaching purpose.

　　73.technical foul 技术犯规///free throw 罚球///field goal 进球得分///three-point shot///out-of-bound 界外

　　74.Believe you me! 你最好相信我!

　　75."settle for sth" means reluctantly accept sth that is not so satisfactory.

　　76.credibility problem

　　77.The fact has silenced the doubters.

　　78.It's staging a remarkable comeback.

　　79.At Yahoo, spontaneity is out, order is in.

　　80.Wait a few years before we judge them as a group.

　　小编建议：学习贵在坚持，同学们可以每天选出几个句型背一背，再用这些句型练练笔，时间一长，相信同学们的写作的感觉就会培养出来的，这样在考雅思作文时也能应对自如了。