From the _____ expression on her face, we knew that she was very _____ with the result.

 With the Internet widely used, a(an)___change has taken place in the way people communicate with one another.

It is known that ________ medical examination helps people to find out health problems as early as possible.

Our English teacher is a _____ and strict man.

 With the development of the Internet，______ communication is done by regular mail.