单项选择题
A．fastest B．best C．most slowly D．most efficiently
A．involves Juliet in a murder B．sends Romeo and Juliet into evil-doing C．causes late arrival of a message for Romeo D．leads to a happy meeting between Romeo and Juliet
A．The length of the list. B．The type of the items. C．The time difference of relearning. D．The time difference of brain working.