Whitman wrote Leaves of Grass as a tribute(赞颂) to the Civil War soldiers who (had laid) on the battlefields and (whom) he (had seen) (while serving) as an army nurse.

单项选择题The president, with his wife and daughter, (are) returning (from) a brief vacation at Sun Valley in order (to attend) a press conference (this afternoon).

单项选择题They went away for a fortnight on holiday.