The parents waved and the train until it was out of sight.A. sawB. noticedC. observedD. w

发布时间：2020-08-16 09:11:11


The parents waved and      the train until it was out of sight.
A. saw
B. noticed
C. observed
D. watched

网友回答

A. saw
B. noticed
C. observed
(答案→)D. watched
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