My father is now in his late forty but he looks young for his age. He is very strict with me, especial in my studies. Besides, I know he loves me deeply in his heart. Once I had failed to do well in my math exam, I was afraid that it would make my father angry and disappointing. On contrary, he said I had tried my best and offered him a few words of encouragement. He told me that there is no need to feel bad about one and two failures and the most important thing is to learn anything from failure and never give up. Today is Father’s Day and I want to say thank you for my father. . ... in his late forty ... forty → forties
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(答案→). ... in his late forty ... forty → forties
解析：
【小题1】 ... in his late forty ... forty → forties
固定搭配in one’s forties在某人四十几岁的时候。
【小题2】. ... especial in my ... especial → especially
本句只有副词especially来修饰谓语部分，在句中作做状语。
【小题3】 Besides, I know ... Besides → However
本句使用however表示上下文的转折关系，我的父亲对我要求很严格，然而我很爱他。
【小题4】. Once I had failed ... had去掉
Once表示曾经，描述的是过去发生的事情，故使用过去时即可。
【小题5】. ... angry and disappointing. disappointing → disappointed
本句中的形容词angry和disappointed对前面的宾语my father的情况进行补充说明。故使用过去分词转换的形容词修饰人。
【小题6】. On contrary ... contrary前加the
固定搭配on the contrary恰恰相反。
【小题7】. ... offered him a few... him → me
本句是指爸爸给我一些鼓励的话，而不是给他。
【小题8】... one and two ... and → or
本句指上下文的选择关系，指一两个失败的事情。
【小题9】. ... learn anything from ... anything → something
本句使用something用于肯定句中，指从失败里学习了一些知识。
【小题10】 ... say thank you for ... for → to
固定搭配say something to sb向某人说….。