仔细阅读下列10句句子，根据所给动词在答题卷的相应位置写出该动词的恰当形式。
People who ______________(share) offices with smokers may become ill as a result of other people’s smoking.
The selfless teacher devoted all his life to ______________ (teach) the poor children in the mountainous areas.
What the chief editor said at the meeting ________________ (set) down and printed.
It is great fun _________________ (walk) through the clouds in the setting sun.
The pilot asked all the passengers to remain _____________ (seat) as the plane was making a landing.
__________(use) your head and you will find a way to solve the problem.
How anxious we were while_________(sit) in the classroom waiting for the results of the entrance examination.
The film ___________ (be) on for 30 minutes when we reached the cinema.
The visitor was badly injured. I insisted that a doctor ___________ (send) for immediately.
You can hardly imagine the silly woman ________________ (fall) in love with an advanced robot.