Due to the complexity of the subject, winter travelling in the backcountry is never 100% safe. Good avalanche safety is a continuous 61 , including route selection and examination of the snowpack, weather 62 , and human factors. Several well-known good habits can also 63 the risk. If local authorities issue avalanche risk reports, they should be considered and all warnings should be paid 64 to. Never follow in the tracks of others without your own evaluations; snow conditions are almost certain to have changed since they were made. Observe the terrain and note obvious avalanche paths where plants are 65 or damaged. Avoid traveling below others who might trigger an avalanche.
51. A among
B of
C to
D in
52. A when
B that
C who
D whose
53. A mostly
B likely
C clearly
D surely
54. A are
B will be
C is
D was
55. A weight
B form
C risk
D work
56. A fall
B flow
C roll
D gather
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