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题目内容
（河南城建学院大学英语四）
31. (单选题)
Our country’s iron and steel industry （ ） very rapidly for about 20 years .
(本题1.0分)
A、 have been developing
B、 has been developing
C、 have being developed
D、 has being developed
Our country’s iron and steel industry （ ） very rapidly for about 20 years .
(本题1.0分)
A、 have been developing
B、 has been developing
C、 have being developed
D、 has being developed
参考答案