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.to
B.on
C.out
I hear that they are going to focus _ _ _ _ _ _ the tourist industry.
A.to
B.on
C.out
参考答案：
佳题速递：