I ______on the door for ten minutes now without an answer.

admin2007-10-13 54

问题 I ______on the door for ten minutes now without an answer.

选项 A、was knocking
B、am knocking
C、knocking
D、have been knocking

答案D

解析本题测试时态。本句的意思是： “我直到现在敲了 10分钟门也没人回答。”“have been doing”是现在完成进行时，表示从过去某一时间开始持续到现在的动作。例如：He has been waiting for you for the whole morning，(他等了你整整一个上午了。)

转载请注明原文地址:https://jikaoti.com/ti/LDBYFFFM

成人本科学位英语

相关试题推荐

Thequestionofwhatchildrenlearn,andhowtheyshouldlearnit,iscontinuallybeingdebatedandre-debated.Nobodydaresany
WhenTVnewsprogramsreportwarsordisasters,theeditorsrarelyusethemosthorrifyingpicturesofdeadorwoundedvictimsb
A:Dideverythingcomeoutasexactlyasyouplanned?B:______
Statistics______hismostdifficultsubjectandtheyareallworriedthathewon’tpassthetest.
Wantaglimpseofthefutureofhealthcare?Takealookatthewaythevariousnetworksofpeopleinvolvedinpatientcareare
In1798thepoliticaleconomistMalthuspredictedthatintimemankindwouldfacestarvation,havingoutgrowntheavailablefood
Arapidmeansoflong-distancetransportationbecameanecessityfortheUnitedStatesassettlement(新拓居地)spreadeverfarther
Withonlyabout1000pandasleftintheworld.Chinaisdesperatelytryingtoclonetheanimalandsavetheendangeredspecies.
WhentheWesternEuropeannationsrosetopowerinthe15thand16thcenturies,theiraimwastofindatraderoutetotheEast.
Formillionsofyearsbeforetheappearanceoftheelectriclight,shiftwork,allnightcableTVandtheInternet,Earth’screa

随机试题

腹股沟韧带()
下列不属于医学研究的伦理审查的是
以下关于骨骼的X线表现的描述，错误的是
男性，68岁。因胃癌入院。既往有糖尿病史12年。测血糖14mmol/L，24小时肌酐清除率40ml/min，血尿素氮17mmol/L。该病人术前血糖应控制在
无特殊要求的上人平屋面的均布活荷载标准值为：
背景资料：某大型水电站工地，施工单位A在重力坝浇筑过程中，管理人员只在作业现场的危险区悬挂了警示牌，夜间施工时，却发生了高空坠落死亡3人的事故。工程建设期间，还时常发生当地群众到建设管理单位及施工工地大量聚集事件。当工程某隐蔽部位的一道工序施工结束，在未
电气线路的消防保护措施不包括()。
财政补助收入是指事业单位按照核定的部门预算经费申报关系从财政部门和主管部门取得的各类事业经费。()
人本位儿童观认为()。(郑州)
在浓度为40%的糖水中加入5千克水，使浓度变为30%。现在要使糖水浓度变为50%，需要再加()千克糖。

最新回复(0)

I ______on the door for ten minutes now without an answer.

成人本科学位英语

Thequestionofwhatchildrenlearn,andhowtheyshouldlearnit,iscontinuallybeingdebatedandre-debated.Nobodydaresany

WhenTVnewsprogramsreportwarsordisasters,theeditorsrarelyusethemosthorrifyingpicturesofdeadorwoundedvictimsb

A:Dideverythingcomeoutasexactlyasyouplanned?B:______

Statistics______hismostdifficultsubjectandtheyareallworriedthathewon’tpassthetest.

Wantaglimpseofthefutureofhealthcare?Takealookatthewaythevariousnetworksofpeopleinvolvedinpatientcareare

In1798thepoliticaleconomistMalthuspredictedthatintimemankindwouldfacestarvation,havingoutgrowntheavailablefood

Arapidmeansoflong-distancetransportationbecameanecessityfortheUnitedStatesassettlement(新拓居地)spreadeverfarther

Withonlyabout1000pandasleftintheworld.Chinaisdesperatelytryingtoclonetheanimalandsavetheendangeredspecies.

WhentheWesternEuropeannationsrosetopowerinthe15thand16thcenturies,theiraimwastofindatraderoutetotheEast.

Formillionsofyearsbeforetheappearanceoftheelectriclight,shiftwork,allnightcableTVandtheInternet,Earth’screa

腹股沟韧带()

下列不属于医学研究的伦理审查的是

以下关于骨骼的X线表现的描述，错误的是

男性，68岁。因胃癌入院。既往有糖尿病史12年。测血糖14mmol/L，24小时肌酐清除率40ml/min，血尿素氮17mmol/L。该病人术前血糖应控制在

无特殊要求的上人平屋面的均布活荷载标准值为：

电气线路的消防保护措施不包括()。

财政补助收入是指事业单位按照核定的部门预算经费申报关系从财政部门和主管部门取得的各类事业经费。()

人本位儿童观认为()。(郑州)

在浓度为40%的糖水中加入5千克水，使浓度变为30%。现在要使糖水浓度变为50%，需要再加()千克糖。