the building is said(to have been pulled down)last month.
be said to do,据说.
be said that.据说.吗,根据以上两点,只能选择带有不定式的答案,只有前两项.
last month,说明事情发生在过去.而to be pulled down表示将来要发生.to have been pulled down表示发生在谓语动词is 前,发生在过去.所以答案应该是to have been pulled down
the building is said(to have been pulled down)last month.
be said to do,据说.
be said that.据说.吗,根据以上两点,只能选择带有不定式的答案,只有前两项.
last month,说明事情发生在过去.而to be pulled down表示将来要发生.to have been pulled down表示发生在谓语动词is 前,发生在过去.所以答案应该是to have been pulled down