we had planned to go climbing ,but our work_______,we had to canc_英语解答

we had planned to go climbing ,but our work_______,we had to cancel our plan.
A.not being finished B.not having finished C.had not been finished D.was not finished
那个正解是A。帮我分析下

人气：137 ℃　时间：2020-06-12 15:03:44

解答

因为这里有三个句子用逗号连接,只有一个连词,所以其中一个必然不能是完整的句子,（填空处）可以是独立主格,动词短语,介词短语等.首先排除C D,剩下AB不是一个完整的句子.A.B项都是独立主格结构.如果B项中 having 后面...