• A. Determination of Drug Abuse
• B. Measures against of drug abuse
• C. Drug Testing in the Workplace
• D. Classification of Psychoactive Drugs
• E. Definition
• F. Depressants’ Functions

Paragraph 4 ______.

A．She is out of work now.
B．Three of her former colleagues killed themselves.
C．It was no surprise what her former colleague did.
D．She had worked for more than 10 years when she was laid of