新概念3第一课puma at a large

新概念3第一课puma at a large
课后的多项选择题中的结构题(新版的是17页)
___________________it immediately ran away.
a) Observing her b)On being observed
c)Having been observed d) On her being observed
选什么呢 原因?
缤纷三万里 1年前 已收到1个回答 举报

ybice1999 春芽

共回答了18个问题采纳率:100% 举报

选b
意思是一被发现,它就逃跑了
主句也就是it immediately ran away 的主语是it 也就是那个puma ,从句如果要省略主语的话,从句的主语也必须是puma.所以原句应该是
On it was boserved ,it immidiately ran away.而 一...就...的结构选bd,所以只能选

1年前

10
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