Question

Alex changed his mind at the last minute，otherwise we ________ an agreement.

A．should have reached	B．could have reached
C．can reach	D．should reach

Answer 1

B

句意為：亞歷克斯最終改變了主意，否則的話我們就會(huì)達(dá)成一致了。對(duì)過(guò)去事情的推測(cè)，應(yīng)該使用“情態(tài)動(dòng)詞＋have done”。should have done應(yīng)該已經(jīng)做了……；could have done很可能已經(jīng)做了……。所以應(yīng)該選擇B項(xiàng)。