[单项选择]Until recently, body heat has caused problems because it ______.
A. was difficult to collect
B. came in a variety of forms
C. was difficult to get rid of
D. tended to be absorbed by physical objects

[单项选择]Isabel Weiss has also chosen to learn Chinese because（）
A. she wants a brighter future
B. she finds it fun to learn the language
C. she likes to do business in China
D. she watches people speak the language

[单项选择]A policeman has to be trained in criminal law because______.
A. he must work hard to help reform criminals
B. he must believe as professional lawyers do
C. he must be able to tell when and where a crime is committed
D. he must justify the arrests he makes of criminals

[单项选择]Please remain （）until the plane has come to a complete stop。
A. to seat
B. to be seated
C. seating
D. seated

[单项选择]The car manufacturer has ______ 1,000 workers because of the drop in sales.
A. picked out
B. gave up
C. dealt with
D. laid off

[单项选择]What has sometimes caused plants to die out
A. Interference from foresters.
B. Variations in climate.
C. The absence of wooded land.
D. The introduction of new type of plants.

[单项选择]Why has growing population of young people caused the changes in museums
A. Because they are better educated.
B. Because they have less spare time.
C. Because they are stronger.
D. Because there are more young people.

[单项选择]Please remain ______ until the plane has come to a complete stop.
A. to seat
B. to be seated
C. seating
D. seated

[单项选择]Heat exhaustion is a condition caused by ______ to sunlight or another heat source which often results in dehydration and salt depletion.
A. a reaction to
B. overexposure
C. an limitation of
D. an absence of

[单项选择]According to the passage, Vesuvius has caused serious damage
A. six times.
B. seven times.
C. eight times.
D. nine times.

[单项选择]The HIV virus has caused more deaths in developed countries.

[单项选择]The result of this biochemical test has caused an uproar, and ever since its publication, researchers have been full of responses of ------- quality: whereas some deal with the test's implications in a calm manner, others sound alarms.
A. (A) choleric
B. (B) admonitory
C. (C) whimsical
D. (D) homogenous
E. (E) variable

[单项选择]

Our culture has caused most Americans to assume not only that our language is universal, but that the gestures we use are understood by everyone. We do not realize that waving good-bye is the way to summon a person from the Philippines to one’s side, or that in Italy and some Latin-American countries, curling the finger to oneself is a sign of farewell. Those private citizens who sent packages to our troops occupying Germany after World War II and marked them GIFT to escape duty payments did not bother to find out that "Gift" means poison in German. Moreover, we like to think of ourselves as friendly, yet we prefer to be at least 3 feet or an arm’s length away from others，Latins and Middle Easterners like to come closer and touch, which makes Americans uncomfortable.
Our linguistic (语言上的) and cultural blindness and the casualness with which we take notice of the developed tastes, gestures, customs and languages of other countries, are losing us frien
A. stand still
B. jump aside
C. step forward
D. draw back

[单项选择]What has caused the textile industry in New England to move down to the Southeast
A. The lower cost of labor in the Southeast.
B. The large potential market in the Southeast.
C. The proximity to raw materials in the Southeast.
D. The better transportation system in the Southeast.