He ________ sitting.

[　　]

Do you want to keep the windows ________?

[　　]

The heavy rain kept him ________ to school.

[　　]

The wind is so hard that it is difficult to keep the door ________.

[　　]

I kept him ________ for about an hour.

[　　]

He studies in the evening instead ________ the day.

[　　]

It is the first time the painting ________ the public.

[　　]

The doctor was sent ________.

[　　]

He ________ for ten years but still doesn't want to leave office.

[　　]

The first prize was awarded ________ the youngest competitor.

[　　]