---Have you seen ( )pen I left it here this morning.---Is it ( )black one I think i saw itsomewhere.A:a;the B:the;the C:a;a

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---Haveyouseen()penIleftitherethismorning.---Isit()blackoneIthinkisawitsomewhere.A:a;theB:the;theC:a

---Have you seen ( )pen I left it here this morning.---Is it ( )black one I think i saw itsomewhere.A:a;the B:the;the C:a;a
---Have you seen ( )pen I left it here this morning.---Is it ( )black one I think i saw it
somewhere.A:a;the B:the;the C:a;a

---Have you seen ( )pen I left it here this morning.---Is it ( )black one I think i saw itsomewhere.A:a;the B:the;the C:a;a
c 从第二空知道对方并不确定不见的笔是黑色的,因此是泛指,用a,从而选c.

have you seen anything Have you seen John? “Have You Ever Seen Me? Have you ever seen snow? Since I have seen you Where have you seen them? have you seen的意思 Have You Seen Her 歌词 have not seen you ages what emergencies you have seen I HAVE NOT SEEN YOU , you have seen me for many have you ever seen the rain中文歌词 maybe some of you have seen have you seen my food?什么时态 Have You Seen Me Lately?歌词 Have You Seen Her Lately?歌词 Have you seen such a film!