1.C2.B3.C4.B5.A6.A7.C8.A9.B10.A11.B12.C13.B14.C15.A16.C21.B22.B23.A24.D25.C26.D27.C28.B29.A30.D31.B32.D33.C34.C35.A36.A37.C38.D39.D40.A41.D42.B43.C44.B45.A46.B48.C48.D49.A50.A51.B52.C53.B54.B55.C56.B57.A58.C59.D60.D61.B62.D63.A64.E65.YES.66.They probably much rather be doing someting else 67.Study hall.68.Two hours 69.第二段第一句第三段第一句最后一段第二句 70.What about72.didn't do her homework until 71.Why not 73.It takes us half an hour to 74. I didn't think it neccessary to be afraid of