Dogs are desperate for human eye contact. It’s hard for most people to resist a flash of puppy-dog eyes. Dogs split off from 61 (they)wolf relatives. A paper has found that dogs’ faces are structured for complex 62 (expression)in a way that wolves’ aren’t. There are two muscles 63 work together to widen and open a dog’s eyes, causing them to appear 64 (big), and objectively cuter. 65 for wolves neither muscle was present. When dogs work these muscles, humans respond more positively. This isn’t simply 66 accidental love story, where the eyes of two species just so happen to meet across a crowded planet. Like all the best partnerships, this one more likely 67 (result)from years of evolution and growth.
For a species to change quickly, a pretty 68 (power)force must be having effects on it. And that’s where humans come in. We connect 69 (close)with animals capable of exaggerating the size and width of their eyes, 70 (make)them look like our own human babies.
答案 61. their 62. expressions 63. that 64. bigger 65. But 66. an 67. results 68. powerfull 69.closely 70. making