改写同义句,每空一词

问题描述:

改写同义句,每空一词
He runs very fast.
He is a very ▁▁▁▁ ▁▁▁▁▁▁.
I think he is right.
I think ▁▁▁▁▁▁ ▁▁▁▁▁▁▁▁.

fast runner
him (to be) right