-Have you been to America?-I've never been there but I hope to go there in the future.A. RightB. Wrong
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I ( ) much of the book but I don’t think it interesting.A、readB、have readC、have been readD、am reading
Experiments of this kind ____ in both the U.S. and Europe well before the World War.A have conductedB have been conductedC had conductedD had been conducted
John and I ______ friends for eight years. We first went to know each other at a Christmas party. But we ______ each other a couple of times before that.A had been; have seenB have been; have seenC had been; had seenD have been; had seen
I( )at the same job for fifteen years, and one day I just woke up and said, "Enough!"A、have been workingB、have workedC、had workedD、had been working
If only it ()so cold, perhaps I, too, ()more initiative.A、had been,have shownB、have been,would showC、had’t been,cound't have shownD、had't been,could have shown
Luckily I was wearing a seat belt. If I hadn’t been wearing one, I____seriously.A.would be injuredB.will have been injuredC.will be injuredD.would have been injured
