2. 考研
  3. High oil prices have not yet produced an economic shock among consuming countries, but further rises, especially sharp (1)_____,

High oil prices have not yet produced an economic shock among consuming countries, but further rises, especially sharp (1)_____,

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问题     High oil prices have not yet produced an economic shock among consuming countries, but further rises, especially sharp (1)_____, would undoubtedly hurt the world economy, and (2)_____ would inevitably harm producers, too. Beyond this obvious point, (3)_____, higher prices could even do harm to both oil firms and producers.
Big oil firms (4)_____ rolling in money today, but that disguises the fact that their longer-term prospects are (5)_____. Behind the reserves-accounting scandal at Royal Dutch/ Shell (6)_____ a problem bedeviling all of the majors: replacing their dwindling reserves. (7)_____ existing fields in Alaska and the North Sea are rapidly declining, OPEC countries and Russia are (8)_____ them out. (9)_____ they are to survive in the long term, the big oil firms must embrace other sources of energy (10)_____ oil.
    (11)_____ it is to believe, higher oil prices could be bad news for producing countries (12)_____. Political leaders in Russia, Venezuela and other oil-rich countries are bending laws to crack (13)_____ on foreign firms and to strengthen their grip on oil (14)_____ through state-run firms. This may be convenient for the political leaders themselves. Alas, it is (15)_____ to do much for their countrymen. For years corruption and inefficiency (16)_____ the typical results of government control of oil resources.
    Producing countries should (17)_____ embrace open markets. (18)_____ one thing, shutting out foreign investment will only hurt their own oil output by (19)_____ the sharpest managers and latest technologies. For another, economic liberalisation (including reform of bloated welfare states) would help OPEC countries (20)_____ their economies—as the NAFTA trade deal has done for oil-rich Mexico—and so prepare them for the day when the black gold starts running out.

选项 A、is
B、are
C、has been
D、have been
答案D
解析 本题的考点为动词的时态辨析。根据该句的时间状语For years，可知此处应当选择现在完成时，所以have been符合文意。其他选项的时态搭配都运用不当。
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考研英语一

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