单项选择题
A．Sharp vision.B．Acute hearing.C．Keen sense of smell.D．……
| Questions 14-16 are based on the
following speech. You now have 15 seconds to read Questions 14-
16. |
What is the most important factor for a dog’s survival
A．Sharp vision.
B．Acute hearing.
C．Keen sense of smell.
D．Legs.
