Professor Smith will come here to give a speech.All the preparations must be _____ before 5 o’clock.
--- -When did he get his first novel published?---- It was in 2008 ____ he was still in high school.
Nobody can explain the mystery ____ he suddenly disappeared.
It suddenly___ to me that we could use the computer to do the job.
Though she _______for a moment, she finally went in and asked to see a dress that was in the window.
The survey shows that a large number of teenagers are __________cigarettes nowadays.