Question

【题目】At college, Barack Obama didn’t know that he the first black president of the United States of America.

A. was to become B. becomes

C. is to become D. became

Answer 1

【答案】A

【解析】试题分析：句意：在大学的时候，奥巴马不知道他将成为美国第一个黑人总统。用过去将来时表示过去某个时间将要发生的事情，所以选A。