there were not any in sightThere were not any in sight.They ____(新概念2P145)A could not be seen B were not seen 选哪个?为什么?

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therewerenotanyinsightTherewerenotanyinsight.They____(新概念2P145)AcouldnotbeseenBwerenotseen选哪个?为什么?th

there were not any in sightThere were not any in sight.They ____(新概念2P145)A could not be seen B were not seen 选哪个?为什么?
there were not any in sight
There were not any in sight.They ____(新概念2P145)
A could not be seen B were not seen
选哪个?为什么?

there were not any in sightThere were not any in sight.They ____(新概念2P145)A could not be seen B were not seen 选哪个?为什么?
选A
第一个的意思是视野内一个也没有,联系上下文也就是说我找不到他们,这里用they做主语,被动语态,也就是 他们不能被发现.