As to the subject, we have consulted the most _______ professor who gave us _______ explanation.

---Are you satisfied with what she has done? ---Not a little. It can’t be ________.

 If the doctor is ______ this afternoon, I will take my little daughter to him for a thorough checkup.

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

After a thorough search, the rescue team finally brought the mountain climber back, ______.