Our school has a c __________ where we can buy medicine.
His job is to o __________ the lift.
Some people think that he was dismissed for p __________ reasons.
He p __________ the land for $ 200,000.
If you want to borrow some books, you can first look at the library c __________.
Mother is __________ (缝补）by the fire.
Next Monday is the __________ (周年纪念日）of the day I first met you.
He __________ (捐赠）his collection of pictures to the museum.
A watchdog is a __________ (安全，保障）against burglars.
The pine-tree has a very wide __________ (分布）in this area.