53.（ ）

(单选题)2. （ ） (单选题)1. （ ） (单选题)What should the “swim-with-dolphins” industry do according t (单选题)Why are young dolphins more likely to swim with humans? (单选题)What makes “swim-with-dolphins” tourism popular? (单选题)From the passage, we learn that the author ______ comparison (单选题)The author presents the phenomenon of the comparison by ____ (单选题)According to the author, why would people like to post wonde (单选题)When do we start ourselves with others? (单选题)The writer is against______.