Don’t be ________ by products promising to make you lose weight quickly.

Teachers have to constantly update their knowledge in order to maintain their professional ________.　　　　　　　　　　　　　　　　　　

Had she __________ her promise, she would have made it at Beijing University.

Surfing the Internet is ___ a kind of relaxation, ____ our knowledge.

 Doctors often advise us to pay more attention to our diets and mental health and to take ________ examinations.