(2013·北京卷) --- So what is the procedure? --- All the applicants before a final decision is made by the authority.
—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.
The man we followed suddenly stopped and looked as if ________ whether he was going in the right direction.