How much money was spent on holiday online shopping last year

A．They will review the seminar on Chicago together.
B．They will attend Mr. Johnson’s seminar again.
C．They will attend a seminar on US economy.
D．They will meet again on next Friday for a seminar.

A．His car was hit by another car.
B．He was hurt while playing volleyball.
C．He fell down the stairs and got injured.
D．He was hit by a ear while crossing the street.