The old man wrote a letter to the hospital,____ his thanks .The old man wrote a letter to the hospital,____ his thanks to the doctors who had cured his illness.a.expressed b.expressing c.to express为什么选B?A.C错哪?

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The old man wrote a letter to the hospital,____ his thanks .The old man wrote a letter to the hospital,____ his thanks to the doctors who had cured his illness.a.expressed b.expressing c.to express为什么选B?A.C错哪?

The old man wrote a letter to the hospital,____ his thanks .The old man wrote a letter to the hospital,____ his thanks to the doctors who had cured his illness.a.expressed b.expressing c.to express为什么选B?A.C错哪?
The old man wrote a letter to the hospital,____ his thanks .
The old man wrote a letter to the hospital,____ his thanks to the doctors who had cured his illness.
a.expressed b.expressing c.to express
为什么选B?A.C错哪?

The old man wrote a letter to the hospital,____ his thanks .The old man wrote a letter to the hospital,____ his thanks to the doctors who had cured his illness.a.expressed b.expressing c.to express为什么选B?A.C错哪?
首先你仔细看句子,这个句子的逗号前后都没有连词,说明这是一个句子,而不是两个句子,如果选A,则A不可能是谓语动词,因为没有连词.如果是非谓语动词,那么这个词是过去分词,表被动,当然也不对了,所以不选A.C是不定式,不定式表示将来,也不太合适.如果说是表示目的,那么就不该用逗号,所以只有B合适,是一种伴随状语.

A是实义动词express的过去式 主句已经有了谓语动词，所以分句要用分词，选B是对的。
而C前面用了write， write是及物动词，后面不能接to

B伴随状语表主动~

-ing作为伴随状语,common sense
对于A,是letter主动地向doctor表达感谢,所以不用表示被动的-ed的形式,
对于C,估计楼主是吧它看作目的状语,那么to express前面就不应该用逗号吧它和主句隔开,一半来说只有句首状语才有可能加逗号把状语和主句隔开

man ,wrote,the,a,about,book,animals 连词成句 The old man wrote a letter to the hospital,____ his thanks .The old man wrote a letter to the hospital,____ his thanks to the doctors who had cured his illness.a.expressed b.expressing c.to express为什么选B?A.C错哪? The old man makes a living (bysellingnewspapers). 是the old man has a five years old grandson还是the old man has a five-year-old grandson? The old man often took a walk.The old man ______ _________take a walk. 1He wrote carefully some letters to his friends 2All the students think highly of his teaching3The old man lives a lonely life4I'll get my hair cut tomorrow5Mary handed her homework to the teacher分析句子成分 the old man born! The old man looks ( )is the old man? ( )is the old man? 同义句the old man could ride a horseThe old man _____ _____ _____ride a horse A girl helped an old man,and the old man was excited译成中文 the,man,told,old,the,a,boy,story 排列顺序 the old man has two children, a son a ________ a tiny old man with the face of a ferret The old man lives in a w__ house The old man lives in a big house h___ The old man walks __ a stick.(介词填空)