【正确答案】 C

【答案解析】祈使句+and+一主谓结构(常为虚拟式)=if从句+一个主句。有时，祈使句也可以是一名词短语，该题正是这种情况。此句相当于：If we had got two scores more，we could have won the last game，因此，正确答案为C。再比如：Five minutes earlier，we could have caught that train．如果早来五分钟，我们就可以赶上那趟车。