高等继续教育 / 大学英语语法
正确率：100%
题型描述: 单选题
The prevention and treatment of AIDS is ＿＿＿＿＿ we can cooperate.
A.an area where
B.an area
C.an area that
D.an area with which
The prevention and treatment of AIDS is ＿＿＿＿＿ we can cooperate.
A.an area where
B.an area
C.an area that
D.an area with which
参考答案：