Jack______from home for two days now, and I am beginning to worry about his safety.

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问题 Jack______from home for two days now, and I am beginning to worry about his safety.

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

答案A

解析根据句意，杰克的失踪是过去发生的事实，且现在仍在持续中，因此要用现在完成进行时。

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考博英语

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Jack______from home for two days now, and I am beginning to worry about his safety.

考博英语

Asusedinthefirstlineofthesecondparagraph,theword"utter"means______.

Inchargeofanarmyofseventhousandmen,he______theorientalcityforninemonthsandfinallydefeatedit.

Itwasanallusiontowhatthescientistthoughtwasaninappropriatedistributionoffundsforstemcellresearch.

Thereisonlyonedifferencebetweenanoldmanandayoungone:theyoungonehasagloriousfuturebeforehimandtheoldone

Nowadays,withplentifuliceandelectricchurning,fewpeoplerecallthesharedexcitementoftheerawhenmakingicecreamwas

Thefactthattheseregionsare______innaturalresourcesdoesn’tmeanlocalpeoplearewelloff.

Restrainedfromtheslave-trade—thefavoritetrafficofthechiefs—A(opposedin)theirmaraudingpropensity,andthreatenedbyt

Intheearlyyearsofthetwentiethcentury,astrophysiciststurnedtheirattentiontoaspecialcategoryofstars,knownasCep

Aswithahumanbaby,youmustbepatient,______andunderstandingofyourpetsmistakes.

IntheSpringExportCommoditiesFairthe______offinechinaattractedmuchattentionofcustomersfromallovertheworld.

女性，53岁，阴道不规则流血，超声显像见子宫浆膜下、肌壁和黏膜有多个大小不等结节，最可能诊断是()

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