2. 外语
  3. All flights ______ because of the terrible weather, they had to go there by train.

All flights ______ because of the terrible weather, they had to go there by train.

admin2009-01-05  48
问题 All flights ______ because of the terrible weather, they had to go there by train.
选项 A、having been canceled
B、had been canceled
C、having canceled
D、were canceled
答案A
解析 英语中两个或两个以上句子间一般都用连词来连接，以构成并列关系或从属关系，据此我们可以将B 和D 排除。A 和C 都是现在分词短语，和田all flights 构成独立主格结构，作原因状语，又因为cancel和由all flights 具有逻辑上的动宾关系，所以应用被动式。例如：The assembling of the machine completed，we started operating it．机器安装完毕，我们就开始操作。The wire well insulated，we can use it
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