In my opinion, it was really a great ______ for her to be pleasant to people she didn’t like.

While visiting the robot exhibition, the professor kept nodding his head to express his _______ with his students’ work.

I am considering changing to a more interesting job, as the present job, which requires a lot of _______, nearly bores me to death. 

The members of the club wouldn't run a _____ in entrusting（委托） the organization to an unreliable person.

You should follow _____ of the medicine, and take three pills every day.