They the train until it disappeared in the distance.A. sawB. foundC. noticedD. observed

发布时间：2020-08-16 21:43:05

They      the train until it disappeared in the distance.
A. saw
B. found
C. noticed
D. observed

网友回答

A. saw
B. found
C. noticed
(答案→)D. observed
解析：考察动词。Saw 看到 found 发现 notice注意到 observe观察，
句意为，他们观察这辆火车知道它消失在远方。
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