______ many times, this radio receiver is found very sensitive.

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问题 ______ many times, this radio receiver is found very sensitive.

选项 A、Being tested
B、Having been tested
C、Having tested
D、Testing

答案B

解析语法结构题。本句的难点是：完成时的现在分词形式在本句中作时间状语，表明测试的时间在发现灵敏度很高之前，being tested不能够表达这一含义，而having tested 和testing动作的主体和逻辑主语为人，造成时间状语的逻辑主语和主句的主语不一致，故只能选B 。本句的意思是：经过多次测试以后，发现这台无线电接收机的灵敏度很高。

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专业英语四级

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______ many times, this radio receiver is found very sensitive.

专业英语四级

DearJack,(1)Atyourphysicalyesterday,menursemeasuredyouat5feet9inches.Youhaveofficiallypassedyouroldman.

Giventheamountoftimepeoplespendatworknowadays,itmakessensethatpeopleareseekingoutapotentialmateatwork.In

A、Itwasbecausethefirsttimewasn’tasuccess.B、Thissecondtimewasforherunbornbaby.C、Shewantedtosetagoodexample

A、Reducingvehiclenumbersonhighways.B、Forbiddinghonkingthehornloudly.C、Improvingdrivers’behaviors.D、Restrictingspac

(1)Israelisa"powerhouseofagriculturaltechnology",saysAbrahamGorenofElbitImaging(EI),anIsraelimultinational.The

PassageTwo(1)Everyoneintoday’ssuperchargedworkplacesexperiencesstress.Yetexecutiveandprofessionalwomenconsis

Themovementofthemoonconvenientlyprovidedtheunitofmonth,whichwas______fromonenewmoontothenext.

Everyoneisfamiliarwiththecryofthedirectorwhoisabouttoshootasceneforanewmovie:"Quietontheset!"isthecomm

Itwasreportedthattheproject_________bytheendofthismonth.

NotonlyyoubutalsoI______mistakenonthispoint.

风湿性心脏病心力衰竭服用地高辛13天，出现恶心、呕吐，室性期前收缩二联律，除停用洋地黄外，治疗应首选()

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