The smile on his face suggested that he _____ happy to have given_其他解答

The smile on his face suggested that he _____ happy to have given help to his classmates.
A was B should be 选哪个?为什么?

人气：144 ℃　时间：2019-09-05 08:58:34

解答

前面suggested表示推测,大概是...
所以选择should be 表示应该是
was的语气是客观过去发生的