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

試題分析：句意：凱薩琳，我已經(jīng)為你打掃了房間。--謝謝，你本不必這么做，我自己能行。因?yàn)榉块g已經(jīng)打掃過(guò)了，所以是needn’t have done本不必做而做了，A. needn’t do不必做（事實(shí)），C. mustn’t do禁止做，D. shouldn’t have done本不應(yīng)該做而做了，根據(jù)句意選B。