问题
选择题
By the year 1889, there were just 541 bison ________ in the whole of North America.
A．leaving alive
B．to leave alive
C．to be left alive
D．left alive
答案
答案：D
考察非谓语动词.句意:到1889年在整个北美洲,只有541头还活着的北美野牛.过去分词表示被动的发生过的动作,和句子主语是动宾关系,结合语境可知选D.
