单项选择题

In recent years, railroads have been combining with each other, merging into super-systems, causing ______ concerns about monopoly.

A．enhanced
B．curbed
C．disrupted
D．heightened
<上一题 目录 下一题>
热门 试题

单项选择题
She is a woman of fairness and ______ who has never abandoned her principles for the sake of making money.
A．sentiment
B．sensation
C．integrity
D．temperament
单项选择题
Mr. Brown's condition looks very serious and it is doubtful if he will pull ______.
A．up
B．through
C．out
D．back
相关试题