Professor Smith, along with his assistants, ______on the project day and night to meet the deadline.

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

A．Genuine writers often findtheir work interesting and rewarding.
B．A writer’s success depends on luck rather than on efforts.
C．Famous writers usually live in poverty and isolation.
D．The chances for a writer to become successful are small.