1 . At the same time, live, detailed maps of Earth’s surface ________ aid humanity in amazing ways. (用适当的词填空)

2 . Whisper Camel-Means, the tribes division manager for the wildlife refuge, said under the Fish and Wildlife Service supervision, the exhibits there previously used a different tribes’ word for bison, which they ________ not accept. (用适当的词填空)

3 . The screw was so tight that it ________ not move.

A．could

B．should

C．would

D．might