When ______ about the possibility that Justin was taken by aliens, Detective Sam Peterson said that there was no hard evidence about this.
—Tom, would you like to come to our dinner party? — _____.
I don’t doubt ________ the plan will be well-conceived.
—Shall I begin the lecture? —I’m afraid we have to wait for a while. John is coming with a microphone. — ______. I can do without the microphone.
-----Let’s go to a place _______ we can make a round—trip in one day? ------What about one _______ we can climb and swim?
— I’m going to travel to Sydney. Would you please tell me about your experiences there? — .Let’s discuss it over lunch.