4) It is known to all that fresh air is _______ to our health and the new park ______ us all, so we should keep it clean.(benefit)

　　5) The boy who used to ______on his parents now wants the ______ from them and is learning to be _______.(depend)

　　6) Praise acts as an ______ to the players, and therefore they will feel ______ and get the _______to continue and improve their performance.(encourage)

　　7) My brother ______ from a well-known American university. My parents attended his _______ ceremony yesterday.(graduate)

　　8) When someone ______ others on their success, he or she usually says “_______”.(congratulate)

　　9) This concert was _______ by a famous _______ from Vienna. (conduct)

　　keys:1) disabled; disabilities 2) ambitious; ambitions 3) politician; politics; political 4) beneficial; benefits 5) depend; independence; independent 6) encouragement; encouraged; courage 7) graduated; graduation 8) congratulates; congratulations 9) conducted; conductor

　　IV 重点词汇 （旨在提供综合运用所需材料）

　　1. ambition

　　(n.) 雄心

　　[重点用法]ambitious adj. 志向远大的; 有雄心壮志的;有野心的be ambitious for [power, social position, etc.] 极欲获得[权力, 社会地位等]

　　be ambitious of success渴望成功be ambitious to serve the people一心想为人民服务

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