-I have already been to the Great Wall three times.-When ___ you __ there?-In 1990,1996 and2003A.have;been B.did;go C.will;go D.have;gone

问题描述:

-I have already been to the Great Wall three times.-When ___ you __ there?-In 1990,1996 and2003
A.have;been B.did;go C.will;go D.have;gone

When (did) you (go) there?-In 1990,1996 and2003
你什么时候去的?