—Five.
I'm than you.
作文：
题目：以“我学会了 ”为题写一篇文章。
要求：①补全题目；②立意自定；③文体自选；④不少于600字；⑤文中不得出现真实姓名、校名等。
China began to open to the outside world in the late 1970s. _________, there have been great changes in the country.
