The two children______towards the sea at about 11 o’clock.

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问题 The two children______towards the sea at about 11 o’clock.

选项 A、were seen running
B、were seen run
C、saw running
D、have been seen running

答案A

解析 感官动词题。根据四个选项可知,本题考查感官动词的被动形式,即see/hear+sb.+doing。当sb.提前时,感官动词用被动语态。当see/hear sb.do谓语动词变被动语态时,主语补足语前加to,即be seen to do。因此选择A。
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