the old scientist with his two students__the prize in the Great Hall of the People.a.was seen accept b.were seen accept c.was seen to accept d.were seen to accept写出原因!

the old scientist with his two students__the prize in the Great Hall of the People.
a.was seen accept
b.were seen accept
c.was seen to accept
d.were seen to accept
写出原因!

C
主语+ with+ 名词,代词 + 谓语
这个句型中的谓语应该和前面的主语在数上保持一致,这里主语是 the old scientist 是单数,所以这么选； A 的结构有问题 was seen to accept
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C A介词B 主语由A决定， 排除BD
被看到做某事 be seen to do...
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C
这个老科学家和他的两个学生被看见在人民大会堂里接受了奖励
the old scientist with his two students 这里主语是the old scientist ,而his two students是伴随状态，
所以主语为单数，BD不对
因是被动语态，动词不定式一定要加　to
~~~~~~~~~~~~~~~~~~~~~祝你进步，...

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C
这个老科学家和他的两个学生被看见在人民大会堂里接受了奖励
the old scientist with his two students 这里主语是the old scientist ,而his two students是伴随状态，
所以主语为单数，BD不对
因是被动语态，动词不定式一定要加　to
~~~~~~~~~~~~~~~~~~~~~祝你进步，有疑问可追问，请及时采纳~~~~~~~~~~~~~~~~~~~~

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c.was seen to accept
主语是the old scientist ，而with his two students只是伴随而已，所以谓语用单数。
see 是不带to 的不定式，被动语态要还原to