Inspired by the seniors in college and      his own responsbilities，Dick is determined to work harder．

The generous man devoted all he had _______ the victims, because of which he was highly praised.

Last summer holiday, I went back to my hometown, _______ the neighbors and the house _____ I used to be familiar with were gone. 

—The hall      for international conferences is of great importance.—I see, and we are sure to complete it on time.

David apologized for ______ to inform me of the change in the plan.