My nephew ______ from home for three days now, and I am beginning to worry about his safety.

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问题 My nephew ______ from home for three days now, and I am beginning to worry about his safety.

选项 A、has been missed
B、was missed
C、has been missing
D、had been missing

答案C

解析 miss一词的一ing形式和-ed形式的区别及时态一致。missing为形容词，表示“(人或物)下落不明，失踪的”；missed是过去分词形式，与be动词连用，为被动关系，表示“被错过的”。依句意，此处应取“失踪的”这一含义，排除A、B。由句中的时间状语for three days now可确定用现在完成时，因此选项C正确。

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专业英语四级

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My nephew ______ from home for three days now, and I am beginning to worry about his safety.

专业英语四级

Howmanyartistsareontherecording?

Sheseemstobefullofbeansalltheday.Theunderlinedwordmeans______.

Somegoodsareleftunsold.Theitalicizedpartfunctionsasa(n)______.

Thelossoftherainforestswouldupsettheclimatesoftropicalcountries,bringingdroughtsandfloodsand______soil.

AccordingtoMiamiPoliceDepartmentspokesmanDelrishMoss,thefollowingprofessionsarepopularinthepastEXCEPT

Poortransportfacilitiesandthelackofresources,rawmaterialsandenergyalsopartly______thedropincontractfulfillment

Therearesigns______theworstoftherecessionmaybeover.

Thesmallvillagewasperfectlyquiet,exceptforafew______dogbarking.

Inthesentence"Allthetaskshavingbeenfulfilledaheadoftime,theydecidedtogoonholidayforaweek",theunderlinedph

麻醉前给药必须用阿托品类药物的麻醉方法是

中国特色社会主义事业的领导核心是()

设y=，则y’=________。

A、静脉注射B、脊椎腔注射C、肌内注射D、皮下注射E、皮内注射可以添加抑菌剂的注射液是（）

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黄河上游的著名峡谷有()。

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通过企业资本结构的调整，可以()。

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