Combine each pair of sentences into one sentence containing a that-or wh- clause as object. Examples I have made a mistake. I admit it. →I admit that I have made a mistake. Have I made a mistake? I wonder. →I wonder whether. I have made a mistake. Help will arrive at any moment. I expect so. Please tell me. I don't know who Brian is. I believe Mike. I think he is the right person for the job. Should we continue the next day or not? We could not decide.