问题描述:
-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
-Oh,he ——a very smart boy then .
A、must have been B、might be C、should have been D、could be
问题解答:
我来补答展开全文阅读