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The development of new inventions in the field of space travel seemed rapid. how does the word rapid function in a sentence?

What is the key similarity between the characters of gerasim and vladimir ivanich in tolstoy’s the death of ivan ilyich?

What is implied in this sentence from mark twain's "the £1,000,000 bank-note"? i was puzzled, and wanted to discuss the matter a little further, but they didn't; so i took my leave, feeling hurt and insulted to be made the butt of what was apparently some kind of a practical joke, and yet obliged to put up with it, not being in circumstances to resent affronts from rich and strong folk.