单项选择题
A.He helped Doris build up the furniture. B.Doris helped him arrange the furniture. C.Doris fixed up some of the bookshelves. D.He was good at assembling bookshelves.
A.Accompany her roommate to the classroom. B.Hand in her roommate’s application form. C.Submit her roommate’s assignment. D.Help her roommate with her report.
A.She had a job interview to attend. B.She was busy finishing her project. C.She had to attend an important meeting. D.She was in the middle of writing an essay.