问题
选择题
— Have you received the books which ______ online?
— Not yet. [ ]
A. pays for
B. paid for
C. pay for
D. were paid for
答案
答案：D
搜题请搜索小程序“爱下问搜题”
— Have you received the books which ______ online?
— Not yet. [ ]
A. pays for
B. paid for
C. pay for
D. were paid for
答案：D