21.（ ）

(单选题)In the word ______, the “or” is pronounced as [ɜ:]. (单选题)What can we infer from the passage? (单选题)Which of the following titles best sums up the passage? (单选题)The principle of homeopathy is that ______. (单选题)Which of the following does NOT belong to holistic medicine? (单选题)This story mainly tells you ______. (单选题)When you are lost in the forest, but you want to leave your (单选题)If you get lost in the forest, you should ______. (单选题)Joe only had one piece of good meat because ______. (单选题)Which of the following is true?