2．Elephants are the largest living animals on land．More than 500（46）Bkinds of elephants were found on the earth over the last 55million years．Only（47）Akinds are still alive today：the African elephant and the Asian （or Indian） elephant．These elephants can only be found in （48）A places．However，the older kinds lived in cold places a long time（49）C．An example is the mammoth （猛犸象）-the largest hairy elephant．
The mammoth was the largest living elephant，which was about seven tons．（50）Bthe elephants today，mammoths had black or dark brown hairs（51）Btheir bodies．All the mammoths had tusks （长牙）．
Scientists found most of the extinct （灭绝的） animals by（52）Bthe fossils，（53）Dtheir bones and teeth that could be found．However，mammoths are quite different．During the Ice Age，mammoths died and were covered（54）C in the ice．The ice kept them very well．So scientists could find the （55）Abody of the mammoth．
| 46．A．same | B．different | C．large | D．small |
| 47．A．two | B．three | C．four | D．five |
| 48．A．hot | B．cold | C．cool | D．warm |
| 49．A．after | B．later | C．ago | D．away |
| 50．A．Aside | B．Unlike | C．As | D．For |
| 51．A．filling | B．covering | C．laying | D．pushing |
| 52．A．dealing | B．studying | C．buying | D．fixing |
| 53．A．for sure | B．as well | C．aside from | D．such as |
| 54．A．sadly | B．gently | C．deeply | D．easily |
| 55．A．whole | B．all | C．part | D．piece． |
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