1、Parasitic wasps lay their eggs directly into the eggs of various host insects in exactly the right numbers for any suitable size of host egg. If they laid too many eggs in a host egg, the developing wasp larvae would compete with each other to the death for nutrients and space. If too few eggs were laid, portions of the host egg would decay, killing the wasp larvae.Which of the following conclusions can properly be drawn from the information above?
(A) The size of the smallest host egg that a wasp could theoretically parasitize can be determined from the wasp’s egg-laying behavior.
(B) Host insects lack any effective defenses against the form of predation practiced by parasitic wasps.
(C) Parasitic wasps learn from experience how many eggs to lay into the eggs of different host species.
(D) Failure to lay enough eggs would lead to the death of the developing wasp larvae more quickly than would laying too many eggs.（A）
(E) Parasitic wasps use visual clues to calculate the size of a host egg.
2、For a local government to outlaw all strikes by its workers is a costly mistake, because all its labor disputes must then be settled by binding arbitration, without any negotiated public-sector labor settlements guiding the arbitrators. Strikes should be outlawed only for categories of public-sector workers for whose services no acceptable substitute exists.The statements above best support which of the following conclusions?
（A） Where public-service workers are permitted to strike, contract negotiations with those workers are typically settled without a strike.
（B） Where strikes by all categories of pubic-sector workers are outlawed, no acceptable substitutes for the services provided by any of those workers are available.
（C） Binding arbitration tends to be more advantageous for public-service workers where it is the only available means of settling labor disputes with such workers.
（D） Most categories of public-sector workers have no counterparts in the private sector.（C）
（E） A strike by workers in a local government is unlikely to be settled without help from an arbitrator
还有一道语法题：
most of Portugal's 250000 university students boycotted classes in a one-day strike to protest a law that requires them to contribute $330 a year toward the cost of higher education,previously paying $7 per year.
A、a year toward the cost of higher education,previously paying $7 per year
B、a year toward the cost of higher education,for which was previously paid $7 per year.
C、a year,compared to the previously $7 per year,toward the cost of higher education
D、a year toward the cost of higher education,instead of the $7 per year required previously
E、a year as opposed to the $7 per year required previously for the cost of higher education
此题选D
谢谢各位了~~~
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