--______my books?---_____in the bookcase.

The company used 50 percent of the raw materials, the rest of which __________ sent to other cities to help the factories there.

Large amounts of money _______ spent on the bridge, which ________ to be completed the next month.

When and where this took place _____ still unknown.

All the scientific evidence        that increasing use of chemicals in farming    damaging our health.