21．[2010·成都三诊]-Did you visit Italy this winter holiday? -No．We it.but we spent too much time shopping in France. A．could have visited B．must have visited C．shall have visited D．need have visited 21A考查动词的虚拟语气.表示与过去的事实相反用could/should/would have done的形式.句意:我们本能去参观意大利的.但我们在法国购物的时间太长了. 【查看更多】
