Since no evidence has been found so far he was guilty, he has to be set free.

Being a doctor is one of the few professions＿＿＿＿if you make a mistake，it can mean somebody’s life

(2013·高考四川卷)Nowadays people are more concerned about the environment________they live.

I had great difficulty___________ thesuitable food on the menu in that restaurant.

"Double click" means you click twice on thebutton of the _______ to start the program.