单项选择题
A．因为我想帮忙，所以我要抓紧写论文了。 B．我也很想帮忙，可是我还有学期论文要写。 C．我很想帮忙，只是我还要整理本学期的试卷。 D．虽然要整理本学期的试卷，我还是很想帮忙。
A、mood B、tiredness C、carelessness D、weather
A、The past and present size of Harvard University. B、The development of Harvard University. C、Some important presidents of Harvard University. D、The religious influence on Harvard University.