Choose the word or set of words that, when inserted into the sentence, best completes the sentence.
Caught completely unaware by his professor's question, Alfred timidly ventured a guess, which much to his relief, his professor __________.
Choose the word or set of words that, when inserted into the sentence, best completes the sentence.
Sam has memorized the most __________ details about dinosaurs, and seems to have an inexhaustible knowledge about the most arcane details concerning these prehistoric animals.