­th strong→strength　　　 　　力气；强项

warm→warmth 温暖；热情 ­y ­ty ­ity honest→honesty　　　 　 　诚实

difficult→difficulty 困难

cruel→cruelty 残酷；残暴

safe→safety 安全

disable→disability 无能；伤残

responsible→responsibility 责任 　　

　[命题点感悟]

　　单句语法填空

　　①(2018·全国卷Ⅱ)This switch has decreased ________ (pollute) in the country's major lakes and reservoirs and made drinking water safer for people.

　　解析：pollution　decrease"降低，减少"，为及物动词，后接名词作宾语，故填名词pollution。

　　②(2018·浙江6月高考)Researchers have found that there is a direct link between the increase in food eaten outside the home and the rise in ________(weigh) problems.

　　解析：weight　根据语境可知，此处表示体重方面的问题，故此处填名词作定语。

　　③(2017·全国卷Ⅱ)This development was only possible with the________ (introduce) of electric­powered engines and lifts.

　　解析：introduction　根据空格前面的定冠词the可知此处需要填名词。with the introduction of表示"随着......的引进"。

　　④(2017·全国卷Ⅲ)She is determined to carry on with her ________(educate)．

　　解析：education　空格前面有形容词性物主代词her，此处应该使用动词educate的名词形式education。

　　⑤(2016·浙江10月高考)Magically, that show remains the Great Jason's best ________ (perform) to this day.

　　解析：performance　根据前面的show可知此处需要填名词。"这是Great Jason's迄今最好的表演"。