Question

15．He could have been a doctor 20 years ago，but he ______ to be a teacher．（　�。�

• A． chose
• B． had chosen
• C． has chosen
• D． chooses

Answer 1

分析 二十年前他本來(lái)可以當(dāng)一名醫(yī)生，但他選擇了當(dāng)老師．

解答 答案：A
題干中He could have been a doctor 20 years ago表示對(duì)過(guò)去事實(shí)的相反假設(shè)；句中20 years ago是過(guò)去的時(shí)間狀語(yǔ)，表示過(guò)去發(fā)生的事實(shí)，要用一般過(guò)去時(shí)態(tài)．故選A．

點(diǎn)評(píng) 一般過(guò)去時(shí)態(tài)表示過(guò)去某個(gè)時(shí)間發(fā)生的動(dòng)作或存在的狀態(tài)或表示過(guò)去經(jīng)常或過(guò)去反復(fù)發(fā)生的動(dòng)作．