1 . The engineers made two big plans for the dam, ______ was never put in force.

A．one of them	B．which
C．one of which	D．every one of which

2 . A retired brick worker Joao, ______ lives in an island, found the small penguin ______ on rocks at his local beach in 2011.

A．that; lying

B．who; lying

C．who; laying

D．which; laying

3 . The Jiuquan Satellite Launch Center, ________ the Gaofen 3C radar satellite was launched on April 7, 2022, lies in northwestern China’s Gobi Desert.

A．from which

B．of which

C．to which

D．on which

4 . You will have to wait for one more week, ________ the manager will be back from his trip.

A．when

B．which

C．that

D．after