【题目】----What happened to the young trees we planted last week？
---The trees_____________ well，but I didn't water them.
A.might growB.needn't have grown
C.would growD.would have grown
在线课程【答案】D
【解析】
考查虚拟语气。句意：——我们上周种的树苗，发生了什么事情？——树苗本来可以长得很好，但是我没有给它们浇水。与过去事实相反的假设，主句：主语+should(would, could, might)+现在完成时+其他，故选D。