单项选择题
We have to（）the job applications into groups based on their qualifications.
A.sendB.changeC.checkD.sort
单项选择题 She went to the post office to mail a（）.
单项选择题 It is（）making an effort。
单项选择题 The（）is a federal statute，enacted in 1890，that makes certain restraints of trade and monopolistic acts illegal.
