Although the size of the workforce depends a great deal on the size of the total population, there are several other influences which also affect it. The age distribution of the total population has a very (21) effect on the available workforce. If the population has a high (22) of very young people or of (23) too old to work, then the available workforce would be lower than (24) there were an (25) spread age distribution. If the population grows raidly (26) natural increase, i.e., the number of births greatly (27) the number of deaths, then as a total population increases the proportion of the workforce (28) .
Sometimes a population is described as aging, (29) means that the birth rate is either falling or growing very slowly, and as people retire (30) the workforce there are insufficient numbers of young people entering it to (31) those who are leaving it. The population is
A. neither
B. none
C. both
D. either
Henry’s job was to examine cars which crossed the frontier to make sure that they were not smuggling any thing into the country. Every evening except at weekends, he (36) see a factory worker coming up the hill towards the frontier, (37) a bicycle with a big load of straw on it. When the bicycle (38) the frontier, Henry used to stop the man and (39) him take the straw off and (40) it. Then he would examine the straw very carefully to see (41) he could find anything, after which he would look in all the man’s pockets (42) he let him tie the straw again. The man would then put it on his bicycle and go off down the hill with it. Although Henry was always (43) to find gold or jewellery or other valuable things (44) in the straw, he never found (45) , even though he examined it very carefully. He was sure that the man was (46) something, but he was not (47) to imagine what it could be.
A. return
B. retreat
C. retire
D. rest
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