-Tom graduated from college at a very young age .-Oh,he ——a very _英语解答

-Tom graduated from college at a very young age .
-Oh,he ——a very smart boy then .
A、must have been B、might be C、should have been D、could be

人气：348 ℃　时间：2020-06-10 01:13:15

解答

A
肯定那是是个聪明的男孩.
B是可能是但表示一种状态或者现在的情况（be)
C.本应该should have been
D 可能是 /可以成为.