My boss won't pay me（）I work harder.

A．smoking in forests
B．changing the attitudes and behavior of millions of people
C．the chief causes of forest fires and their prevention
D．advances in knowledge of fire weather

A．Information in short-term memory is different from that in long-term memory.
B．Long-term memory can be achieved only by training.
C．It is easier to test short-term memory than long-term memory.
D．Henning gave a separate test on vocabulary to his students.