...birds. In the 1980s,the Internet was not that popular in...
根据倒数第三段He went into the snow mountains six times just to get valuable photographs of the monkeys.(他进了雪山六次,只是为了给猴子拍一些有价值的)可知他给猴子拍了一些有价值的照片,通过这种方式保护猴子。故选:D。(3)语义猜测题。根据第四段It created great challenges fo...