.
C) He leaves the airport first at the end of the trip.
D) His luggage comes out last.
20. A) He was told to board the wrong plane.
B) He was not allowed to board the plane.
C) He arrived at the airport without a ticket.
D) He found it difficult to explain why he arrived so early.
Part II Reading Comprehension (35 minutes)
Passage One
Questions 21 to 25 are based on the following passage:
There are desert plants which survive the dry season in the form of inactive seeds. There
are aim desert insects which survive as inactive larvae (幼虫). In addition, difficult as it is to
believe, there are desert fish which can survive through years of drought (干旱) in the form of
inactive eggs. These are the shrimps (小虾) that live in the Mojave Desert, an intensely dry region in the south- west of the United States where shade temperatures of over 50C are often
recorded.
The eggs of the Mojave shrimps are the size and have the appearance of grains of sand.
When sufficient spring rain falls to form a lake, once every two to five years, these eggs hatch
(孵化). Then the water is soon filled with millions of tiny shrimps about a millmetre long
which feed on tiny plant and animal organisms which also grow in the temporary desert lake.
Within a week, the shrimps grow from their original 1 millimetre to a length of about 1.5 centimetres.
Throughout the time that the shrimps are rapidly maturing, the water in the lake equally
rapidly evaporates. Therefore, for the shrimps it is a race against time. By the twelfth day, how-
ever, when they are about 3 centimetre 10ng, hundreds of tiny eggs form on the underbodies of
the females. Usually by this time, all that remains of the lake is a large, muddy patch of wet
soil. On the thirteenth day and the next, during the final hours of their brief lives, the shrimps
lay their eggs in the mud. Then, having ensured that their species will survive, the shrimps die
as the last of the water evaporates.
If sufficient rain falls the next year to form another lake, the eggs hatch, and once again the
shrimps pass rapidly through their cycle of growth, adulthood, egg - laying, and death. Some
years there is insufficient rain to form a lake: in this case, the eggs will remain dormant for an-
other year, or even longer if necessary. Very, very occasionally, perhaps twice in a hundred
years, sufficient rain falls to form a deep lake that lasts a month or more. In this case, the species
passes through two cycles of growth, egg - laying, and death. Thus, on such occasions, the
species multiplies considerably, which further ensures its survival.
21. Which of the following is the MOST distinctive feature of Mojave shrimps?
A) Their lives are brief.
B) They feed on plant and animal organisms.
C) Their eggs can survive years of drought.
D) They lay their eggs in the mud.
22. By saying "for the shrimps it is a race against time" (Para. 3, Line 2)the author means
A) they have to swim fast to avoid danger in the rapidly evaporating lake
B) they have to swim fast to catch the animal organisms on which they survive
C) they have to multiply as many as possible within thirteen days
D) they have to complete their life cycle within a short span of time permitted by the
environment
23. The passage mainly deals with
A) the life span of the Mojave shrimps B) the survival of desert shrimps
C) the importance of water to life D) life in the Mojave Desert
24. The word "dormant"( Para. 4, Line 3) most probably means
A) inactive B) strong C) alert D) soft
25. It may be inferred from the passage that
A) appearance and size are most important for life to survive in the desert
B) a species must be able to multiply quickly in order to survive
C) for some species one life cycle in a year is enough to survive the desert drought
D) some species develop a unique life pattern to survive in extremely harsh conditions
Passage Two
Questions 26 to 30 are based on the following passage:
Opportunities for rewarding work become fewer for both men and women as they grow
older. After age 40, job hunting becomes even more difficult. Man
上一页 [1] [2] [3] [4] [5] [6] [7] 下一页
