答案与解析

　　1．satisfied　形容词作定语。修饰人的表情，声音，微笑用­ed 形式的形容词。

　　2．it　it作形式宾语，代替后面的不定式。

　　3．has been　since then与现在完成时连用。

　　4．to buy　afford后跟不定式形式作宾语。

　　5．wasting/having wasted　regret后跟动名词或having done，表示“后悔干过某事”。

　　6．of　get rid of除掉。

　　7．seeing　avoid后跟动名词形式作宾语。

　　8．to work　have no choice but to do sth.别无选择只好做某事。

　　9．on; to　focus on专注于；lead to导致。

　　10．to grow　序数词后用不定式形式作定语。

　　.课文浓缩语法填空

　　Yuan Longping, is one of China's most famous scientists. Over the past five decades, he __1__ (struggle) for an approach __2__ (increase) the output of rice without expanding the area of the fields. Born in 1930, Dr Yuan graduated from Southest Agricultural College in 1953. Since then, __3__ (find) ways to grow more rice has been his life goal. At that time, __4__ (hungry) was a __5__ (disturb) problem in many parts of the countryside. In 1973, he became the first agricultural pioneer in the world __6__ (grow) rice that has a high output. His dream to help the world get rid __7__ hunger came true.

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