2012专四完形填空参考答案:
31.A massive
32.D transformed
33.B continuously
34.D cause
35.A collided with
36.C when
37.B however
38.D which
39.A unpredictable
40.C crust
41.B bursts out
42.B and
43.D that
44.B active
45.C still
46.B (on和across有点纠结,也可能选其他的)
47.A (are to 和 might 仿佛都可以,只是语气不同)
48.B even
49.A accidents
50.B save