单选题All flights _____ because of the storm, they decided to take the train.Ahaving cancelledBwere cancelledChave been cancelledDcancelled
单选题
All flights _____ because of the storm, they decided to take the train.
A
having cancelled
B
were cancelled
C
have been cancelled
D
cancelled
参考解析
解析：
句子的两个部分中间是逗号，且后面的部分是完整的句子，所以前面的句子应该是不完整的，排除B、C。根据句意可知“航班已经被取消”，应该用被动完成式，用分词的独立主格作状语表示原因。故为D。
句子的两个部分中间是逗号，且后面的部分是完整的句子，所以前面的句子应该是不完整的，排除B、C。根据句意可知“航班已经被取消”，应该用被动完成式，用分词的独立主格作状语表示原因。故为D。
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