Choose the best prepositions to complete the sentences.

Choose the correct option.

I can't believe this! He carried [through|off|out|on] as if nothing had happened.

I have no doubt that she will carry [through|off|out|on] the first prize.

Jack is determined to carry [through|off|out|on] his plans.

Even though it's a difficult task, I am counting on you to carry it [through|off|out|on].