问题
选择题
The Harry Potter books are quite popular; they are in great ______ in this city.[ ]
A. quality
B. progress
C. production
D. demand
答案
答案：D
搜题请搜索小程序“爱下问搜题”
The Harry Potter books are quite popular; they are in great ______ in this city.[ ]
A. quality
B. progress
C. production
D. demand
答案：D
