问题补充:
We would have to put off the visit to the Water Cube it rain tomorrow.
A. Would
B. Were
C. Should
D. Could
答案:
A. Would
B. Were
(答案→)C. Should
D. Could
解析:考查虚拟语气。此题省略了if, 只能提前would.还原后的句型为 If it should rain tomorrow ,We would have to put off the visit to the Water Cube .在这种对将来的假设条件句中,可用一般过去时、were to do、should do 这三种形式,没有would do 结构。句意:如果明天下雨的话,我们将不得不推迟参观水立方。故C正确。