Do you know which library _______,the students'?A.did he go B.he went C.did he go to D.he went to
问题描述：
Do you know which library _______,the students'?
A.did he go B.he went C.did he go to D.he went to
答
B
答
D
Do you know which library he went to for the students?
答
D，前面有疑问词 which 了，所以后面用陈述句语序，不用did了，所以B D里选。
然后将 he went to the library 变形，就成为 the library he went to，所以选 D
答
D.he went to
答
D.he went to
因为地点要加介词to,所以选B是错误的.
祝好!