题目内容
17、More bison were killed．The bison population is thought ______ from 60 million to just a
few hundred between 1850 and 1910.
A．to have fallen B．having fallen
C．to fall D．falling
试题答案
17、A
More bison were killed．The bison population is thought ______ from 60 million to just a few hundred between 1850 and 1910.
|
A．to have fallen |
B．having fallen |
|
C．to fall |
D．falling |
查看习题详情和答案>>
More bison were killed．The bison population is thought ______ from 60 million to just a few hundred between 1850 and 1910.
- A.to have fallen
- B.having fallen
- C.to fall
- D.falling
More bison were killed．The bison population is thought ______ from 60 million to just a few hundred between 1850 and 1910.
A．to have fallen B．having fallen
C．to fall D．falling
查看习题详情和答案>>More bison were killed．The bison population is thought ______ from 60 million to just a
few hundred between 1850 and 1910.
A．to have fallen B．having fallen
C．to fall D．falling
查看习题详情和答案>>More bison were killed．The bison population is thought ______ from 60 million to just a few hundred between 1850 and 1910.
| A．to have fallen | B．having fallen |
| C．to fall | D．falling |