高等继续教育 / 高级英语I
正确率：100%
题型描述: 单选题
I hear that they are going to focus ＿＿ the tourist industry.
A.in
B.at
C.on
D.with
I hear that they are going to focus ＿＿ the tourist industry.
A.in
B.at
C.on
D.with
参考答案：