单项选择题

According to researchers, Richard Nixon’s death was ______.

A．caused by his heart problems.
B．indirectly linked to his wife’s death.
C．the inevitable result of old age.
D．an unexplainable accident.

<上一题目录下一题>

热门试题

单项选择题The research reviewed in the passage suggest that ______.

单项选择题Which title is more appropriate to express the primary idea