I think the answer is correct.

The secret of success is not to think of failure.

I tried thinking about why it was that I didn't trust him.

I do think so.

Don't think about leaving money for your kids, use it all up and enjoy yourself with flair.

This business plan of yours seems almost too optimistic. All I can say is I hope it's more than just wishful thinking.

I couldn't think up such a brief explanation.

I like to think things through before making a decision.

Now that I think over it, it's somewhat embarrassing.

They think little of his achievements.