A. | If I devoted | B. | Had I devoted | ||
C. | Would I be devoted | D. | Should I be devoted |
分析 假如我以前能够将更多的精力放在学习上而不是痴迷于网络游戏,我现在就会坐在舒服的办公室里了.
解答 答案:B.
本句是混合虚拟语气.主句与现在事实是相反,用would+动词原形的形式;而从句与过去事实是相反,故从句中用过去完成时,因为从句中含有had,故可以将if去掉,把had提到主语I前面来.因此选B.
点评 考查时间错综的虚拟条件句.有时if从句和主句所表示的假想情况时间不一致,如从句与现在事实相反,而主句表示与过去事实相反,那么句子两部分的动词形式应作相应的调整.如:If I had asked her for advice yesterday,I should know what to do now.
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Researchers have created a backpack that has a computer and medicines in it that can help even untrained soldiers save the lives of wounded troops. Wounded soldiers have a better chance of survival if they get help soon after being hurt and are quickly taken to a hospital or clinic. But soldiers who do not have medical training may not know how to help their injured friends.
Doctors and engineers have developed what they call an “intelligent backpack”.It has a computer and electronic measuring devices. The backpack also has robotic instruments and medicines ready to give to injured troops.
About 16 doctors and engineers from the University of Pittsburgh, Carnegie Mellon University and several other places are working on the project. The U. S. Department of Defense has given money to the project.
Ron Poropatich leads the project. He is a retired army surgeon. He says the backpack will help soldiers care for those who are injured. The devices included in the backpack can monitor a person^ heart rate and blood pressure. The robotic instruments can even tell whether the soldier has a collapsed lung.
The intelligent backpack's computer can compare information gathered about the injured soldier with thousands of similar cases, and quickly tell the best methods to use to save the soldier’s life.
Sometimes, it is not always possible to quickly remove the injured soldier from the battlefield.So,Dr. Poropatich says, the researchers hope to create a backpack that will have devices .that can keep a .soldier alive for a long time. Dr. Poropatich hopes the backpack and its instruments will be ready for testing animals in about three years.
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