He didn’t make     clear when and where the meeting would be held.

 ______ is necessary for everyone to obey the traffic rules.

 To her joy, Della earned first the trust of her students and then ____ of her colleagues.

—Which of the two subjects do you like, art or music?—        . They are really interesting.

Everyone doesn’t agree to the plan. Some support it while I’m one of ______ opposed to it.