According to Krashen, __________ refers to the gradual and subconscious development ofability in the first language by using it naturally in daily communicative situations.
A.learningB.competenceC.performanceD.acquisition

Nancy′ s gone to work but her car′ s still there. She __________ by bus.
A.must have goneB.should have goneC.ought to have goneD.could have gone

Unlike some other food-capable 3D printers, the Foodini device__________ from the start tobe a specialized food-printing machine.
A.has designedB.has been designedC.would designD.would be designed

Not until some students failed the exam __________how much time they had wasted.
A.they realizedB.did they realizeC.didn' t they realizeD.they didn' t realize

If it __________for his bad cold, Rick would have enjoyed more on his birthday party．
A.is notB.were notC.has not beenD.had not been

When a student said "Yesterday I goed to see a friend of mine", which of the followingways for correcting errors is NOT encouraged
A.Oh, yes. I see you went to see a friend of yours.B.You goed to see your friendC.No, not goed. You should say went.D.Say it again, please.

付款人在进行付款时无（）

A.形式审查义务

B.实质审查义务

C.附带审查义务

D.票据外有关事项的审查义务

根据《公司法》的规定,有限责任公司下列人员中,可以提议召开股东会临时会议的是()。
A.总经理B.人数过半数的股东C.监事会主席D.人数为半数的董事

关于股份有限公司中的监事会，下列说法错误的是()

A.监事会负责提议聘请或更换外部审计机构B.监事会主席和副主席由全体监事过半数选举产生C.监事会中的职工代表的比例不得低于三分之一D.监事会应至少每6个月召开一次会议

三北精神的科学内涵

阿里巴巴提供了“企业名称认证”“企业身份认证”不同种类的认证,可以根据自身的