一道英语单项选择题（请说明理由）1.DoyouKnowhowlong（）?I‘msorryIdon’tknow.A.hehascomehereB.hashearrivedhereC.hehasboughtthebookD.theyhavebeenhere2.Themanlooksunkindandimpolite,（）?A.doesheB.

Question

一道英语单项选择题 （请说明理由 ）
1.Do you Know how long （）?
I‘m sorry I don’t know.
A.he has come here B.has he arrived here C.he has bought the book D.they have been here
2.The man looks unkind and impolite ,（）?
A.does he B.doesn‘t he C.is he D.isn’t be
3.Your French is so good.How long have you been in France?（）I was five.
A.Until B.Since C.When D.Before

Answer 1

1 D do you know 问句后面接的个名词性质的宾语 不需要疑问句的倒装形式 所以B排除 A B C涉及动词能不能持续的问题 come buy都是瞬间发生的动作 而be here是可持续的
2 B 否定反问 如果是be动词,则是isn't he；look不是be动词
3 B 自从我5岁开始.考词义.until直到,when当,before……之前