问题
选择题
This is ________ difficult problem that few students can work it out. [ ]
A. so
B. so a
C. such
D. such a
答案
答案：D
搜题请搜索小程序“爱下问搜题”
This is ________ difficult problem that few students can work it out. [ ]
A. so
B. so a
C. such
D. such a
答案：D