题干


By the year 1889, there were just 541 bison ________ in the whole of North America.
A.leaving aliveB.to leave alive
C.to be left aliveD.left alive
上一题 下一题 0.85难度 单项选择 更新时间:2010-07-09 12:32:12

答案(点此获取答案解析)