Experimentshaveprovedthatchildrencan 

問題詳情：

Experiments have proved that children can  __41__(instruct) in swimming at a very early age. At a special swimming pool in Los Angeles, children become expert at  __42__(hold) their breath under water even before they can walk.   __43__(baby) of two months old do not appear to be reluctant to enter the water. It is not long  __44__ they are so accustomed to swimming  __45__ they can pick up weights from the floor of the pool. A game that is very popular with these young __46__(swim) is the underwater tricycle race. Tricycles are lined up on the floor of the pool seven feet under water. The children compete against each other to reach the other end of the pool. Many pedal their tricycles, __47__ most of them prefer to push or drag them. Some children  __48__ cover the whole length of the pool  __49__ coming up for breath even once. Whether they will ever become future Olympic champions, only time will tell. Meanwhile, they should encourage __50__ among us who cannot swim five yards before they are gasping for air.

41．______　42.______　43.______　44.______　45.______

46．______　47.______　48.______　49.______　50.______

【回答】

instructed　ing　es　re

45．that　mers　　　out　e

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