There is a great difference between achieving to be___and_____achieving 填happy或者happily.

问题描述:

There is a great difference between achieving to be___and_____achieving 填happy或者happily.

第一个空填happy
第二个空填happily请问为什么啊??第一个空 be 后用形容词作表语第二个空修饰动词用副词