_____ people food, housing and jobs is what a government should first consider after a natural disaster happens. 

Professor Li preferred _______ lectures to his students to _______ to meetings on scientific developments.

------I didn't mean ______ my mother.------But talking to her like that meant ______ her.

Rather than ________on a crowded bus, he always prefers _______a bicycle .

 The younger policeman was leaning ______ the wall with his arms folded when he heard someone for help.