分类：教育/科学-学习帮助
问题：英语选择题1.ProfessorLi_______backfro 
1.fessor Li _______ back from America for over two weeks.A.has comeB.has beenC.had come  me答案：Ｂ２.Mr. Smith is a person easy _________.  approachB.approachC.approaching  be approached答案：Ａ３.Although it was so cold,_______he went out without an overcoat.A.butB.howe1.fessor Li _______ back from America for over two weeks.A.has comeB.has beenC.had come  me答案：Ｂ２.Mr. Smith is a person easy _________.  approachB.approachC.approaching  be approached答案：Ａ３.Although it was so cold,_______he went out without an overcoat.A.butB.however d  t答案：Ｄ４.He is the first ______ the top of the mountian. aching   reach  arrive riving 答案：Ｂ5.When he entered the room,he noticed everyone _______ at him.  lookB.lookedC.lookD.looking答案：Ｄ请说出理由
回答：好多啊！
第1题：因为后面加了表示时间段的for over two weeks，所以动词应是可延续的动词或是状态！come是短暂的动词！所以用Be动词来表状态！
第2题：首先easy后面加不定式应该知道！可能是问为什么不用被动！
这里的不定式和前面的主语有一种动宾关系！也就是approach
Mr. Smith ，如果还原为这种句型应该就好理解啦！It is easy to approach Mr. Smith!
第3题：一贯句子只能有一个连词！就是在英语中不能同时用因为。。。所以；虽然。。。但是；这点你也应该知道！那就是问yet啦！yet不是连词，而是副词！有但是的意思！所以可以用啦！
第4题：用reach而不是arrive就不说啦！arrive后要家at或in的！
而序数词后就必须用不定式！
第5题：这里是表伴随的！意思是我进屋的同时，大家看我这个动作是和我进屋的动作同时发生的！所以用ing来表伴随！