_____ worries me is _____ we’re going to pay for all this.
A. It, that B. That, how
C. What, how D. As, that
_____ worries me is _____ we’re going to pay for all this.
A. It, that B. That, how
C. What, how D. As, that
C，
what worries me 为主语从句，且 what 在主语从句中用作主语。