| Q1: | examples of wildlife other than bats which do not rely on vision to navigate by |
| Answer: | B |
| Information in the text: | Paragraph B (line 2): Bats are not the only creatures to face this difficulty today. Obviously the night-flying insects that they prey on must find their way about somehow. Deep-sea fish and whales have… |
| Q2: | how early mammals avoided dying out |
| Answer: | A |
| Information in the text: | Paragraph A (line 8): …our mammalian ancestors probably only managed to survive at all because they found ways of scraping a living at night. |
| Q3: | why bats hunt in the dark |
| Answer: | A |
| Information in the text: | Paragraph A (line 4): Given that there is a living to be made at night, and given that alternative daytime trades are thoroughly occupied, natural selection has favoured bats that make a go of the night-hunting trade. |
| Q4: | how a particular discovery has helped our understanding of bats |
| Answer: | E |
| Information in the text: | Paragraph E (line 6): … and much of our scientific understanding of the details of what bats are doing has come from applying radar theory to them. |
| Q5: | early military use of echolocation |
| Answer: | D |
| Information in the text: | Paragraph D (line 11): After this technique had been invented, it was only a matter of time before weapons designers adapted it for the detection of submarines. |
责任编辑：虫虫
