16-20.B.C.C.D.A21-25..B.B.D.C.C26-30.CACCB31-35DCCDB36-40CBDBA41-45DCBAD
46-50BACDB51-55DCCBA 56-60BDECF
61.differnt 62.example 63.than 64.pay 65.don’t 66.bring 67.taking 68.too 69.staying 70.cheap 71.mile 72.stop 73.north 74.may 75.quick76.parts77.much78.worry79.minutes80.far
16.B 17.A 18.C 19.D 20.A 21.C 22.A 23.C 24.A 25.B 26.C 27.A 28.D 29.D 30.A
31.C.32.D.33.A.34.B.35.B .36.A.37.C..38.D.39.A.40.C41B42.A43.D44.B45.A46.B
47.A 48.C 49.A 50.B 51.B 52.A 53.C 54.A 55.D
56.F57A58E59C60.B
61.like 62.same 63.easy 64.minutes 65.important 66.right 67.books 68.better 69.nobaby
70.hard 71.another 72.training 73.invatation 74.American 75.lessons 76.concert 77.matches 78.whole 79.free 80.whom