1.
BG: Consultant proposed to reassign the workers.Consultant means it will increase the productivity by fully exploiting the available resources.
PM: Director says there is a long-standing commitment that they do not exploit their workers.
Conclusion: Consultant's proposal violate their own policy, so director rejects it.
Weaken: exploit resources does not mean exploit workers.A
2.
BG: Many car drivers violate the high speed limit.
PM: Violating the speed limit is an important factor of car accident.
CC: Installing devices in cars preventing violating the limits would prevent most accidents.
Assumption: there is no other factor than violating speed which leads to car accidents.
答案我不是很明白:C 如果其他司机都不超速的话,那么想要避免车祸就很少需要超速了。
3.
BG: In time of recession-> less consumer-> business lay off workers or close down -> jobless
PM: Recovery of a recession -> more consumer -> expansion of business activity -> need of additional workers,.-> but business have little confidence-> delay hiring workers
CC: After a recession, in the recovery, the jobless populations remains high for a long time. D
4.
BG: Scientists found that during the ice-age, the ice in the Antarctic contains unusually high portion of ferrous materials and low portion of carbon dioxide.
PM: Algae absorbs carbon dioxide.
CC: Ferrous materials prompted the increase in the amount of algae in Antarctic