There are so many people over there.What ________?Maybe there's a traffic accident.选B 其他三个不能选的理由 是什么 A.happens B.is happening C.is happened D.was happened

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Therearesomanypeopleoverthere.What________?Maybethere''satrafficaccident.选B其他三个不能选的理由是什么A.happensB.is

There are so many people over there.What ________?Maybe there's a traffic accident.选B 其他三个不能选的理由 是什么 A.happens B.is happening C.is happened D.was happened
There are so many people over there.What ________?Maybe there's a traffic accident.选B 其他三个不
能选的理由 是什么 A.happens B.is happening C.is happened D.was happened

There are so many people over there.What ________?Maybe there's a traffic accident.选B 其他三个不能选的理由 是什么 A.happens B.is happening C.is happened D.was happened
There are so many people over there.What ________? Maybe there's a traffic accident.
根据语境选B,前\后面句都是现在时,后句更是推测,所以现在正发生什么事是推测的内容.
C.D 被动语态不可能这样用的 A是一般现在时也不能用在happen

因为上文是现在时,说明现在发生的事情。后面那句也是现在时。所以表示的是现在正发生什么事。用现在进行时。

What happened? - 问句提出时,发生的 已经发生 所以总是用过去时

事情 + happen 使用主动语态