根据句意及首字母或汉语提示写出单词。
His father employed a t         for him.
The photos belong in an a         .
He has a valuable c         of stamps.
We got to the r        of the problem.
Prices continue to show an upward t         .     
Losing weight is a slow,g           process.
The number of staff has d           from 217,000 to 114,000．
The general        （趋势） of history is unalterable.
There is widespread         (偏见) against workers over 45．
He stood for the cause of           (自由) and justice.