Professor Tang didn't give us a speech today.It was ________ he had a traffic accident on the way to school.
---What do you think of the film 2012?---Well, it’s good. At least it’s ________ the one I saw last time with Jean.
______ a certain doubt among the parents as to the necessity of children's doing so much homework.
I’m going to spend the summer holiday in Hainan,________ lives my uncle.
From his expression, I don’t think he could have finished his homework last night, _______?
, I believe, and you will find the boy is very outgoing.