139. You only have to ... in order to...
1. You only have to call her in order to know whether she will come or not.
2. I only have to ask the teacher in order to solve the problem.
3. You only have to get some newspapers in order to find the ads you need.
A: Have you started your report yet?
B: I'm having a hard time getting the information.
A: It's easy. You only have to search the internet in order to get the information you're looking for.
B: Oh, I didn't think of that.