单项选择题

Doctors believe that lung cancer is caused ______ by smoking too much.

A. part
B. at part
C. in part
D. with part
<上一题 目录 下一题>
热门 试题

单项选择题
______, you'll accomplish nothing.
A. Without work hard
B. With working hard
C. Without working hard
D. Not work hard
单项选择题
He orders me about ______ my boss.
A. as he is
B. as if he be
C. as if he were
D. as if to be
相关试题