-Could you tell me how many times ____ you _____ Shenzhen in the _英语解答

-Could you tell me how many times ____ you _____ Shenzhen in the psat of year?
A.had;been to B.have;been to
C.did;go to D.have;been in
选哪个?为什么?

人气：128 ℃　时间：2019-10-19 13:44:01

解答

B.have;been to
have been to 与次数连用.could在这不表过去时,只是委婉的语气,所以后面用原来的时态.