初三英语试题People can _____ running everywhere .Do you know what _____ .A.see,has happened B.see,happensC.be seen,is happened D.be seen,is happen这道题的正确选项是什么,说明原因

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初三英语试题
People can _____ running everywhere .Do you know what _____ .
A.see,has happened B.see,happens
C.be seen,is happened D.be seen,is happen
这道题的正确选项是什么,说明原因

楼主应该打错了吧.
应该是 People can be seen running everywhere .Do you know what is happening .
首先,如果选 can see running,的话,由于see 一般式 see sb do/doing sth(看见某人做/正在做某事),所以,排除了主动形式.
所以这里用被动 be seen doing 比较合理.
其次,happen是不及物动词,没有被动,所以C排除.D的话 出现了两个动词,所以只能把happen改成happening,表示正发生什么事