as a subject
The subject of the sentence is who or what the sentence is about. Most of the time in simple sentences like this one, the subject is at the beginning of the sentence. A gerund is a verb that acts like a noun and ends in -ing.
Direct objects receive the action of the verb. This sentence does not have an action verb so it does not have a direct object. The indirect object receives the direct object. For example. I gave Jack the ball. Ball is the direct object because it receives the action "gave". I also think about it in terms of what do I touch first if I'm going to do the action. Then the indirect object is Jack because he receives the ball. He is where I'd go to second. An appositive is a noun that renames or describes another noun. It is usually set off by commas. For example, Jack, my brother, took the ball. My brother is the appositive because it is renaming or describing who Jack is.
You would open your eyes first, then the door.
As you read the passage, which of these answers makes sense when it comes to Elmer? Looking through it, I see that Elmer was a child at the time of the story and was on an adventure. So, to say he was lazy does not make sense. Since he was a child looking for a dragon, it is unlikely that bravery was a part of this scenario. That leaves foolish or lost. He as stood there for awhile watching the lion, so I would say that foolish is the best answer.
By involving the narrator with an odd cast of characters <span />
The Answer is: It is their only way out.
"Yes," replied the Professor, looking at me calmly from under his spectacles, "it is the only chance which remains to us of ever escaping from the interior of the earth to the light of day."