[填空题]Principia Mathematica is surely the most influential book ever written in mathematics.

[单项选择]Most of the people who appear most often and most gloriously in the history books are great conquerors and generals and soldiers, whereas the people who really helped civilization forward are often never mentioned at all. We do not know who first set a broken leg, or launched a seaworthy boat, or calculated the (31) of the year, or manured a field; but we know (32) about the killers and destroyers. People think a great deal of them, so (33) so that on all the highest pillars in the great cities of the world you will find the figure of a conqueror or a general or a soldier. And I think most people believe that the greatest countries are (34) that have beaten in battle the greatest number of other countries and ruled over them as conquerors. It is just possible they are, (35) they are not the most civilized. Animals fight; so do savages; hence to be good at fighting is to be good in the way in (36) an animal or a savage is good, but it is not to
A. which
B. what
C. that
D. whatever

[单项选择]

Interruption, more surely than anything else, kills conversation. The best of talkers interrupt (1) in conversation. However, the (2) interruption of the habitual interrupter and the unintentional, conscious interruption of the (3) talker are two very different things. All habitual interrupters are totally unaware that they continually (4) speeches of their converses and literally knock their very words back (5) their mouths.
Inability to (6) is responsible for one phase of interruption to conversation. It is the (7) eye that tells one’s words have not been heard. "The person next to you must be (8) by my conversation, for it is going into one of his ears and out of the other," said a talker to an inattentive dinner-companion whose absent-minded and (9) replies had been snapping the thread of the thought (10) it grew intolerable.
Because it often (11)
A. occasionally
B. frequently
C. regularly
D. repeatedly

[单项选择]Surely the right to keep and bear arms, outside a militia, shouldn’t include Uzis, AK-47s, and similar assault weapons. The high court’s decision should also firmly set Congress on course to renew the federal ban on assault weapons when it expires next year.
But when it comes to keeping guns out of criminal hands, there’s still much more work to do.
For instance, among the myriad provisions in a giant $ 373 billion omnibus spending bill currently before Congress is a rule change regarding gun-owner background checks. It would have the federal government destroy the record of a background check on a gun buyer within 24 hours--instead of the 90-day rule now in effect.
Keeping such records for only one day would deprive law-enforcement officials of a valuable tool to track individuals, including potential terrorists, who may have slipped through the Justice Department’s National Instant Criminal Background Check System (NICS).
It’s very difficult for gun-right
A. Because keeping records for one day would make it improbable to track terrorists.
B. Because in six months 228 guns were mistakenly sold to unfitting buyers.
C. Because the problem of selling guns to wrong people was only discovered after 24 hours.
D. Because the ironclad importance of 90-day rule will be seen in a year or 5 years.