Question

—Catherine, I have cleaned the room for you.
—Thanks, you __________it. I could manage it myself.

A．needn’t do	B．needn’t have done
C．mustn’t do	D．shouldn’t have done

Answer 1

B

本題考查情態(tài)動詞.根據(jù)句意可知Catherine對對方為她打掃了房間表示感謝并提到對方不必為她打掃房間。needn’t do不需要做……；mustn’t禁止做……，都用于現(xiàn)在的動作；needn’t have done表示做了本來不必去做的事；shouldn’t have done是本不該做卻做某事。