GWD7-Q26 请求回答题干中的时态问题

hanlei8492

                                                                                                  GWD7-Q26:
The Organization of Petroleum Exporting Countries (OPEC) had long been expected to announce a reduction in output to bolster sagging oil prices, but officials of the organization just recently announced that the group will pare daily production by 1.5 million barrels by the beginning of next year, but only if non-OPEC nations, including Norway, Mexico, and Russia, were to trim output by a total of 500,000 barrels a day.

A.    year, but only if non-OPEC nations, including Norway, Mexico, and Russia, were to trim output
B.    year, but only if the output of non-OPEC nations, which includes Norway, Mexico, and Russia, is trimmed
C.    year only if the output of non-OPEC nations, including Norway, Mexico, and Russia, would be trimmed
D.    year only if non-OPEC nations, which includes Norway, Mexico, and Russia, were trimming output
E.    year only if non-OPEC nations, including Norway, Mexico, and Russia, trim output

为什么Announced后面用Will而不是WOULD？
请求高人作答。谢谢～

fansail

http://forum.chasedream.com/GMAT_SC/thread-66894-1-5.html
关于这题为什么过去时和将来时混用

jesmine

http://forum.chasedream.com/GMAT_SC/thread-66894-1-5.html
关于这题为什么过去时和将来时混用

-- by 会员 fansail (2010/9/28 10:04:19)

这题不是过去和将来混用的啊···那个TRIM不是过去式啊