31.B
32.A
33.B
34.C
35.A
36.B
37.B
38.C
39.A
40.C
41.A
42.B
43.A
44.C
45.D
46.C
47.A
48.D
49.B
50.D
51.D
52.C
53.D
54.C
55.B
56.A
57.second 58.scarves/scarfs 59.his 60.dishonest 61.invitation 62.dangerous 63.luckily 64.pollute
65.didn't have 66.big enough 67.how often 68.harmful to 69.if/whether...was 70.be done