Which sentence is gramatically correct?

I thought it weird that she didnt go to the dance.I thought it was weird that she didnt go to the dance. or:I thought it weird that she didn't go to t

I thought it weird that she didn't go to the dance.
I thought it was weird that she didn't go to the dance.

or:I thought it weird that she didn't go to the dance.I thought it was weird that she didn't go to the dance.

or:\"I thought it weird that she didn't go to the dance.\" Is the grammatically incorrect sentence

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