Question

Your teacher ________ very angry at that moment because you talked back to her like that.

A．should have been	B．must have been
C．must be	D．might have been

Answer 1

B

B 考察情態(tài)動詞。由語境可知。你那樣對老師說話。想必他一定很生氣。Should have done過去本應該做某事…實際上卻未做；,must have done一定做了某事；might have done也許已經(jīng)…；根據(jù)at the moment和talked可知此處是對過去事情的猜測，排除C項。由語境可知B正確。