　　 unusual thing happened in our neighborhood and everyone was worried. A. A B. An C. The D. /

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event presence development endeavour

I saw unusual something happened　　 a terrible accident happened 　　 something unusual was seen by me　　 I saw a terrible accident

as if as though so as as

a, a an, an an, a a, an

to happen happened happening be happening

will happen happens should happen happened

will happen happens happened should happen

that which what who

should happen would happen will happen happened

that which what who

a; a an; an a; an an; a

happening were happening has happened had happened

had intended; happened intended; happened intended; had happened would intend; happened

isn't it didn't it don't they aren't they

has such a thing happened such a thing has happened has so a thing has happened so a thing has happened

imagine pretend mean warn

event presence development endeavour

will happen happen should happen happened

unhappy uneasy unable unusual

has such a thing happened such a thing has happened has so a thing has happened so a thing has happened