单项选择题
A.Irrelevant. B.Straightforward. C.Ridiculous. D.Confrontational.
A.Printed textbooks will not disappear any time soon. B.Their cost is students’ chief consideration C.E-books are the first choice of low-income students. D.Science students prefer printed textbooks.
A.Submit no more than three letters. B.Present a new letter of reference. C.Apply to three graduate schools. D.Send Professor Smith a letter.