. _______ before we depart the day after tomorrow, we should have a wonderful dinner party.
A、Had they arrived
B、Would they arrive
C、Were they arriving
D、Were they to arrive
【正确答案】：D
【题目解析】：D【句意】在后天我们走之前他们可以赶过来的，我们会举行一次晚宴。【解析】本句是一个虚拟条件句，主句的谓语用的是“should + 动词原形”，表示与现在事实相反或与将来事实可能相反。根据句子结构可以看出，从句部分是倒装句，省略了连接词if，由于句子中的时间状语是the day after tomorrow，所以从句动词应该用与将来事实可能相反的虚拟语气，即“should（were to）+ 动词原形”，如：Were they to act like that again，we should criticize them severely．要是他们再那样做，我们就要严厉地批评他们。由此可见，D是正确答案．
