Despite much research, there are still certain elements in the life circle of the insect that ______ not fully understood.

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问题 Despite much research, there are still certain elements in the life circle of the insect that ______ not fully understood.

选项 A、is
B、are
C、being
D、to be

答案B

解析此空所在的部分为that引导的定语从句，先行词为elements，根据主谓一致的原则，定语从句中的谓语动词应和先行词保持一致，故B项are正确。

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专业英语四级

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Despite much research, there are still certain elements in the life circle of the insect that ______ not fully understood.

专业英语四级

Someenvironmentalistsaredubiousofthestatementthattheairqualityinthiscityhas_______since2000.

Tom’swifewillalwaysstandbyhisside,_______whatmay.

Livinginthedesertinvolvesalotofproblems,_______watershortageistheworst.

Thestatistics_______thatlivingstandardsintheareahaveimproveddrasticallyinrecenttimes.

Whichoftheunderlinedpartsfunctionsasanobject?

RockClimbingManypeopletakepartinrockclimbingaroundtheworld./Somedoitjustforfunwhileotherscompete./Roc

Computervirus,whoseessential______isasetofinstructions,isonekindofthreattothesecurityandintegrityofcomputer

BreakfastBreakfastisconsideredaveryimportantmeal,/andisessentialtohavingagoodstarttotheday./Infact,on

(1)Afast-foodrestaurantwithinabout500feetofaschoolmayleadtoatleasta5percentincreaseintheoverweightrateat

简述利润敏感性分析的含义及目的。

A．表热证B．真热假寒证C．虚热证D．实热证E．亡阴证

过点(2，1，3)且与直线垂直的平面方程为()。

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Afterdecadesofstaringatapes,FransdeWaalhaswrittenabookaboutwhathumansseewhentheywatchchimpanzees.Thesecrea

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