It is very common for fireworks to contain aluminum, iron, steel, zinc or magnesium dust.

A．He has never been to the laboratory.
B．He wants to stop and ask for directions.
C．The woman won’t be late.
D．The program in the laboratory has already begun.

A．She wants to move to the new apartment.
B．She doesn’t want to move to the new apartment.
C．She likes the newly built student dormitory.
D．She likes the idea of moving into the dormitory.