This platform would collapse if all of us ______ on it.

A．a written contract
B．a gift of money to the new husband
C．the wife’s inheritance from her father
D．the wife’s right to receive one-tenth of her husband’s property

A．The students of the Civil War usually concentrate on the economy.
B．The families of the Civil War are extremely worried about their living.
C．The students of the Civil War usually concentrate on the battlefield.
D．The families of the Civil War are extremely worried about the government.