单项选择题

______for aches, pains and fever, Aspirin is now the subject of multiple investigations of its role in treating many more serious complaints.

A．Long used
B．Being used long
C．Having been long used
D．It has long been used
<上一题 目录 下一题>
热门 试题

单项选择题
It's true that the old road is less direct and a bit bumpy. We won't take the new one ______because we feel as safe on it.
A．however
B．though
C．nevertheless
D．whatsoever
单项选择题
To acquire education is principal way of gaining status in a culture that generally stresses achievement, skillfulness, and upward ______.
A．mobility
B．motivation
C．ambition
D．promotion
相关试题