Answer: "I am sorry that I won't be able to say everything I'd planned in my remaining time, but please let me conclude with . . ." Then state your most important idea and make your conclusion before time runs out.
Explanation: If you may be cut off by the moderator or the chairman, your audience will at least hear the conclusion you planned. If you are stopped ( and it DOES happen ) in mid-sentence or without making your most important point, the audience will see you as disorganized, or insensitive to the time limits, and may have an unfavorable impression of you-- and they will have missed the purpose of your speech.
The answer is "Nature"
The scene described in Walden focuses heavily, if not exclusively, on nature and the effect that the natural wonder of Walden Pond had on Thoreau. This is also the most key element of Transcendentalism: the search for enlightenment not in man-made society but in the natural world.
The answer would be D. Patrick painted the old chair. The transitive verb in the sentence would be painted.
Hope I helped! Good luck! :)