[单项选择]Although beavers rarely remain submerged for more than two minutes, they can stay underwater ___fifteen minutes before having to surface for air.
A. as long
B. as long as
C. so long
D. so long that

[单项选择]We rarely perceive more than minute ______ of the sights and sounds that fall upon our sense organs; the great majority passes us by.
A. fiction
B. function
C. friction
D. fraction

[单项选择]We rarely perceive more than a minute ______ of the sights and sounds that fall upon our sense organs; the great majority pass us by.
A. fiction
B. function
C. fraction
D. friction

[单项选择]We rarely perceive more than a minute ________ of the sights and sounds that fall upon our sense organs; the great majority pass us by.
A. fiction
B. function
C. fraction
D. friction

[单项选择]More and more young Europeans remain single because______.
A. they are driven by an overwhelming sense of individualism
B. they have entered the work force at a much earlier age
C. they have embraced a business culture of stability
D. they are pessimistic about their economic future

[单项选择]I rarely play basketball.
A. normally
B. seldom
C. frequently
D. usually

[单项选择]Beavers have the {{U}}aptitude{{/U}} to build dams.
A. appetite
B. desire
C. competence
D. attitude

[单项选择]Performing rote memory exercises rarely improves the ------- of any given subject, but ------- may nevertheless be useful to the student preparing for an examination.
A. (A) coherence... exercises
B. (B) clarity... heuristics
C. (C) comprehensibility ... mnemonics
D. (D) succinctness ... explication
E. (E) volubility ... summarization

[单项选择]Fashion designers are rarely concerned with vital things like warmth, comfort and ______.
A. stability
B. capability
C. durability
D. availability

[单项选择]Incompetent people rarely know the depths of their own incompetence because they ______.
A. are too dull to know what competence is
B. are not skillful at logical reasoning, grammar, and sense of humor
C. lack the basic skills to evaluate their performance realistically
D. have some ability to overcriticize themselves

[单项选择]Terrorists rarely give any warnings, so what counts is ______ and quick response.
A. postulations
B. precautions
C. promotions
D. presentations

[单项选择].Rarely has a technological development had as great an impact on as much A B aspects of social, economic, and cultural development as the growth of C D electronics.

[单项选择]In American big cities, people rarely （）
A. smile to each other
B. move at a fast pace
C. chat with each other in a shop
D. dine away from home

[单项选择]Why do working conditions generally remain bad
A. The workers are quite satisfied with them.
B. No one can decide what to do about them.
C. Managers see no need to change them.
D. Office workers want to protect their position.

[单项选择]Working conditions generally remain bad because.
A. the workers are quite satisfied with them.
B. no one can decide what to do about them.
C. managers see no need to change them.
D. office workers want to protect their position

[单项选择]

Text 1
Rarely has a national security issue of major importance become a subject of distortion and spin like the debate over the intelligence reform bill on Capitol Hill--the outcome of which will determine how US intelligence agencies and their military function for a generation to come. This is particularly true of the heated debate now taking place over how much power should be given to a new director of national intelligence.
Along with House Armed Services Committee Chairman Duncan Hunter, one of the most respected defense experts on Capitol Hill, the Joint Chiefs of Staff and other elements within the Defense Department have raised serious questions about the farreaching authority granted to the intelligence director under the Senate version of the bill. Specifically, Mr. Hunter believes that the Senate bill would interfere with the military’s access to intelligence on the battlefield.
Right now, Mr. Hunter points out, Army units, Marine
A. gathered.
B. come.
C. piled.
D. originated.