Reading passages

277- The author points out that most true avalanches --------. 
A) are considered to be falling rock not of snow or ice 
B) happen when the snow has started to melt 
C) take place when the snow has melted a little and then frozen hard again 
D) rarely leave behind them a bare rock surface 
E) cause considerable disintegration of the rock surfaces they come in contact with 
278- We can infer from the passage that during an avalanche -------- 
A) rock fragments are likely to be carried down with the falling snow 
B) the falling snow and ice start to melt very soon 
C) there is an absolute threat of life 
D) the failing snow is immediately followed by excessive rain 
E) failing snow banks up steeply against the nearest rock face 
279- The author states that the constant freezing and thawing of water in rock crevices --------. 
A) is what causes an avalanche of snow and rocks 
B) is an unimportant detail for the avalanches 
C) produces a smooth rock surface 
D) causes a build-up of snow on the steep parts 
E) will cause the rock to break up 
Provided the term employment is used in its wider sense as meaning work which is of economic 
value not only to the family but to the community as well. 
It might mean that women have at all times been thus employed. In primitive societies and in 
agricultural communities women shared in the productive work on the land, in the workplaces and 
the home; they took part in trade and they cared for the old and the sick at a time when there were no 
health and welfare services in the modern sense. Indeed, in any society in which the productivity of 
labour is low, women's active participation in the daily work is indispensable. Today, women work in 
the fields in all agricultural communities; they spin and weave, do building work and various other 
kinds of hard physical labour in many parts of the world which have not yet achieved the objectives 
of industrialisation.