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.
考点 平行 动词形式
if条件从句是在announced that的宾语从句中，宾语从句中谓语动词是will pare,if引导真实条件状语从句，主将从选，if从句用一般现在时，排除CD
前面已经有一个but了，后面又来一个but？排除A、B。 C的would be错。 D主谓不一致，应该是include。
补充C： First of all, this is passive --- never a boon on GMAT SC. Furthermore, it's in the subjunctive, suggesting a hypothetical situation. OPEC is playing hardball --- we'll cut output only if you guys cut output. Imagine two people facing some kind of challenge --- eating jalapeno pepper---- person A might say, "I'm going to do it only if you do it." In other words, that language would be very practical and direct. Person A would never say "I am going to do it only if this would be done by you." This latter form is exactly what we have in (C).
0 0 回复 2021-02-20 19:54:53
AB 错在but 是连词后面接句子，AB后面只有从句没有主句 D include要用复数形式 E主动时态由于c被动时态
不仅仅是include吧，因为which includes是非限定，这里应该是限定性修饰，但是用which...也不算错 然后主要是后面， were trimming，因为主句是将来时，从句应该是一般现在时。
0 0 回复 2020-08-17 17:17:19
0 0 回复 2018-05-15 03:09:03
were to do 引导虚拟语气
0 0 回复 2018-05-15 03:09:50