. Doctor Wang _____ at seven o’clock for the conference, but she didn’t turn up.
Guess what! I haven't used this pen for ages and it ______.
With the monthly test approaching, Paul is busy preparing for it, only_____ playing basketball to relax a bit.
According to the new class rule, students foundcellphones in the classrooms will be asked to leave the rooms immediately.
It is a widely held belief____honesty and integrity(正直) are the qualities ____ a leader should be made of.
Scientists believe that it might be several years ______ the medicine can be used on human beings.