All the lights are out. I'm sure they haven't got here already. (they)

These figures don't add up. It's possibe that you're making a mistake. (you)

Their plane landed two hours ago. I'm sure they'll be here any minute now. (they)

You're going to jump out of the aeroplane? I'm sure you're crazy! (you)

We'll arrive ten minutes before the start of the show. I'm fairly sure there will be enough time to collect the tickets. (there)

Charities are sending money and food. I don't believe that is the best way to help them. (that)

I'm going to the shopping mall. The website says it's open until nine. (the shopping mall)