If you go to the movie tonight, so______ I.

A．man hasn’t completely made use of the riches of the sea
B．technology for exploring the sea has been solved
C．harvesting rice in the sea will be made possible
D．in the near future man can live on the ocean floor

A．The need for labor helped the invention of machinery in America
B．The farmer rejected Charles Newbolt’s plow for fear of ruin of their fields.
C．Both Europe and America had great need for farm machinery.
D．It was in Indiana that the first chilled-steel plow was produced.