- 1.Allflights____becauseoftheterr?
- they had to go there by train.
A.having been cancel
B.had been canceled
C.having canceled
D.were canceled
- 选择A.
这是一个独立主格结构,All flights having been canceled because of the terrible weather,表示they had to go there by train的原因，
首先,这句话表示被动含义,并且是已经完成的动作，故排除C,D，其次,两个完整的英语句子中之间必须要有连词连接,若选择B中间应该加一个连词,个人认为应该是so．