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成時(shí)態(tài),結(jié)構(gòu)是have/has+動(dòng)詞的過去分詞,begin和end都是短暫性動(dòng)詞,不能用于現(xiàn)在完成時(shí)態(tài)中表示動(dòng)作或狀態(tài)的延續(xù),因此A,B不正確.has been on在進(jìn)行,開著(的狀態(tài)),故選C【點(diǎn)評】現(xiàn)在完成時(shí)表示延續(xù)性的狀態(tài)。13.—Hi, Tom! you ever the Bird39。s Nest? —Yes, I have. It39。s fantastic. A.Have, been toB.Have, gone toC.Did, go to【答案】 A 【解析】【分析】句意:——你好,Tom!你曾經(jīng)去過鳥巢嗎?——是的,我去過。它是極好的。根據(jù)答語—Yes, I ,排除C。have been to+地點(diǎn)名詞,去過某地,去了并且回來了;have gone to+地點(diǎn)名詞,去了某地,去了還沒有回來,在去或者回來的路上。根據(jù)It39。s ,故選A。 【點(diǎn)評】考查短語辨析,注意平時(shí)識記其區(qū)別,理解句意。14.Mike used to be a top student, but he behind since he lost himself in puter games.A.fellB.has fallenC.wasD.has been【答案】 D 【解析】【分析】句意為“Mike過去是尖子生,但自從迷上電子游戲以來成績落后了”。由since可知but后的主句用現(xiàn)在完成時(shí),瞬間動(dòng)詞fall不能和since引導(dǎo)的時(shí)間狀語從句連用,故用延續(xù)性動(dòng)詞be。故選D?!军c(diǎn)評】本題考查現(xiàn)在完成時(shí)中非延續(xù)性動(dòng)詞和延續(xù)性動(dòng)詞的轉(zhuǎn)換。15.All the students _______ very hard over the last three years.A.worksB.has workedC.have workedD.worked【答案】 C 【解析】【分析】Over the last three years, 用于現(xiàn)在完成時(shí),又由于主語是復(fù)數(shù),故選C?!军c(diǎn)評】現(xiàn)在完成時(shí)的時(shí)間狀語要掌握。16.— have you had the mobile phone?—Since 2015. A.How oftenB.How longC.How soonD.How many【答案】B 【解析】【分析】句意:你什么時(shí)候有的手機(jī)?自從2015年。詢問的是從什么時(shí)候開始,也就是時(shí)間長度。故B選項(xiàng)正確?!军c(diǎn)評】考查特殊疑問句的辨析。17.I a cold. I am not feeling well nowA.caughtB.have caughtC.was catchingD.had caught【答案】 B 【解析】【分析】句意:我感冒了,我現(xiàn)在不舒服。catch a cold意為“感冒”。由句意可知應(yīng)用現(xiàn)在完成時(shí)。故選B?!军c(diǎn)評】考查現(xiàn)在完成時(shí)。18.All members_______ are admitted to the auditorium. A.have got the ticketsB.that had got the ticketsC.that have got the ticketsD.had got the tickets【答案】 C 【解析】【分析】句意:所有得到票的成員都被允許進(jìn)入了觀眾席。根據(jù)題意可知,本句為定語從句,且從句中缺少主語,需要用 that或 who引導(dǎo)