围绕本课标题 Future champions 未来的冠军（儿童游泳训练）主题，AI 老师会出 若干个简单问题，
每个问题听完后，用 完整句子口头作答。
⚠️ 尽量说完整句子，不要只说一个词；优先用本课句型与词语：Experiments have proved that / children can be instructed in swimming / at a very early age / At a special swimming pool in Los Angeles / become expert at holding their breath / under water / even before they can walk / Babies of two months old / do not appear to be reluctant to enter the water / It is not long before / so accustomed to swimming that / pick up weights from the floor of the pool / very popular with these young swimmers / the underwater tricycle race / Tricycles are lined up / seven feet under water / compete against each other / reach the other end of the pool / prefer to push or drag them / cover the whole length of the pool / without coming up for breath / Whether they will ever become future Olympic champions / only time will tell / Meanwhile / those among us who cannot swim five yards / gasping for air