If it for the snow, we the mountain yesterday.
A. were not, could have climbed
B. were not, could climb
C. had not been, could have climbed
D. hadn’t been, could climb
网友回答
A. were not, could have climbed
B. were not, could climb
(答案→)C. had not been, could have climbed
D. hadn’t been, could climb
解析：考查条件句的虚拟语气：句意：要不是因为昨天的雪，我们就会爬到山上了。可知这是和过去相反的if虚拟条件句，if从句用If主语+had+done；主句：主语+should/would/could/might+have done，选C。