问一些高中的英语问题,请速速回答.1.Hisgreatestworkwasdonehehadtheopportunityofmeetinganyofthegreatmenofphysicsofhisday.A.afterB.beforeC.whenD.as2.Alookofadisappointedcameintomymother'seyessheread

Question

问一些高中的英语问题,请速速回答.
1.His greatest work was done_____he had the opportunity of meeting any of the great men of physics of his day.
A.after B.before C.when D.as
2.A look of a disappointed came into my mother's eyes___she read the letter.A.since B.because C.although D.as
3._____having had ten months' strict practice,I decided to make one more effort.A.WhenB.before C.After D.Until
4._____the disscussion was still going on,the president came in and joined us.A.Because B.Since C.While D.Before
5._____he had a passion for walking,we started off on foot instead of by car.
A.When B.While C.As D.After

Answer 1

B,D,C,C,C通过句子意思可知前后两个句子的关系,在他有机会接触到任何当时物理界伟大人物之前,他的著作就已经完成了.any有否定的意思,所以是他没机会见到任何物理界伟人,before是唯一选择,其他的答案填进去都无法说通...