A．The lab-on-a-chip device would be very weakly repelled by magnets.
B．They would make progress in both magnetic and electric fields.
C．There would be more room for the development of future research.
D．The team would manage to move even red blood cells and bacteria.

A．The woman found the mail box empty.
B．The man is waiting for some important mail.
C．The man has just sent out his application.
D．The woman will write a postcard to her daughter.