单项选择题
According to the passage, the sloth will move about when（）
A．it senses a coming danger B．it is forced to swim on a hot day C．it is short of its favorite food D．it wants to keep itself to itself
单项选择题 Which of the following is NOT true about the sloth（）
单项选择题 Which of the following is NOT mentioned or implied by the author（）
单项选择题 The author's purpose in writing the passage is（）
