How___I am to see you again!A.happiness B.unhappily C.happily D.happy

问题描述:

How___I am to see you again!A.happiness B.unhappily C.happily D.happy

D这个实际是由i am 决定的,am 后要跟形容词

D happy 用形容词

答案选D.happy
How+adj +主语+ 谓语 !