We do not permit （）in the office, so we do not permit him（）_ here.

单项选择题Wind and rain continually hit against the surface of the Earth, （） large rocks into smaller and smaller particle.

A．to break
B．would break
C．breaking
D．broken

单项选择题The stubborn young man did not follow the advice that he （）on his behavior since he refused to believe he had done anything wrong.

A．reflect
B．had reflected
C．would reflect
D．must reflect