John and I _____ friends for eight years. We first got to know each other at a Christmas party. But we _____ each other a couple of times before that.
________ as the “first lady of speech”,Dr, Lillian Glass is recognized as one of the world's leading experts on communication skills.
—Why do you look sad? —There are so many problems ________.
A few days after the interview,I recevied a letter ________ me admission to the university.
—We didn't find the Blacks ________ the lecture. —No one had told him about ________ a lecture the following day.
Only ________ according to the directions can the medicine be quite effective.