Are these sentences natural? December 12

[musicgold]

Hi,

Are the following sentences natural to a native ear?

1. It is a big project they are keeping secret.

2. Winters here are not as bad as what you have there.

3. I would be very surprised if didn't make the final round of the competition.

Thanks,
MG.

[SoothingDave]

You're missing a word in the third sentence. Between "if" and "didn't."

[musicgold]

Thanks Dave.