问题
选择题
--Was the driving pleasant when you vocationed in Mexico last summer?
----No, it ___ for four days when we arrived, so that the roads were very muddy.
A．was raining
B．had been raining
C．would be raining
D．have rained
答案
答案：B
这句意是:当我们到达时, 已下了四天的雨, 所以路面非常泥泞.,所以这里要选B项.