四级练习2013.12.31
[audio]http://sound.yywz123.com/tingbbs/cet4/cet420131231.mp3[/audio]Human beings enjoy challenges. (1)________________________________ They ask themselves questions like these: How fast can I run? How high can I jump?(2)___________________________ How long can I hold my breath? Because people enjoy challenges, they like sports and like to watch other people play. (3)______________________________________There are challenges that are not physical challenges.
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