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____ nobody was very enthusiastic about it,they decided to c

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____ nobody was very enthusiastic about it,they decided to cancel the trip.
A.seen that
B.seeing that
C.to see
D.when
____ nobody was very enthusiastic about it,they decided to c
拆开理解
They saw that nobody was very enthusiastic about it.
And they decided to cancel the trip.
把两句合起来就成了你的例句.
动词进行式和过去分词或者不定式可以用在状语里面表示一种状态.动词的形式就取决于动词所表示的动作与主语之间是什么联系.如果该动作是主语完成的,就用动词进行式表示伴随状态.例如:Seeing from the top of the mountain,we feel comfortable.在山顶上望去,我们感到心情舒畅.如果该动词与主语构成被动,那么就用过去分词,同样表示伴随状态.Seen from the top of the mountain,we are so small.(别人)看山顶上的我们如此的渺小.如果该动作是主语还未完成的意味,就用不定式,表示一种目的.例如:To be seen from the mountain,we were holding big flags with us .为了在山上时能被(别人)看到,我们举着大旗子. 再答: 选B
再答: 我只知道这么点儿,希望对你有点点帮助。最好还是问问老师,查语法书确认一下
再答: 为什么不用when,因为句子里只能有一个主语,因此只能用动词分词来作状语表示状态