有一读者问这样一道选择题：
(1)The old man is said_________very rich when he was young.
A.to have been B.having been
C.to be D.to have being
答案是A，C是否是错的呢？
这里必须选 to have been,以表过去，全句即等于：
(2)It is said that the old man was very rich when he was young.
如用 to be，意指现在，显然与句意不合。
