can’t finish the book in less thanan hour, I suppose—_______. I’ll return it to you on time.

下列句子中加点的虚词,意义和用法完全相同的一项是(　　)

is reported in the newspaper is that seven people have been killed in the traffic accident.

He decided to _________ the club for old men and play chess there.

It was with great joy ________ he went to Shanghai to work as a volunteer there.