His dislike of the course may prove to be a(n) （） barrier he cannot overcome.

单项选择题Without their help, she （） in passing the entrance exam.

A．doesn't succeed
B．didn't succeed
C．couldn't succeed
D．couldn't have succeeded

单项选择题To the prisoners' surprise, the policemen used talk （） punishment to educate them.

A．instead
B．rather than
C．without
D．or rather