27.（ ）

(单选题)So far economic and technological changes ______ shifts in t (单选题)Fifty days ______ like a long period for me to wait for the (单选题)Though he is always odd, we can’t ______ his accomplishments (单选题)People who live in the northern U.S. are more generous with (单选题)I still don’t understand why you chose to become an astronau (单选题)Some people hate coffee ______ prefer to drink tea. Others e (单选题)The process of aging and eventual death must be considered a (单选题)The function of the last sentence is to ______. (单选题)Which of the following statements does the writer support? (单选题)Some people claim that nuclear energy is essential because _