Task 2. Say whether the following statements are true or false. 1. A controlled delivery is the delivery of a consignment of goods under the continuous surveillance of customs or police. __ 2. Detaining a drug courier is not the only concern of enforcement agents. __ 3. A "live" controlled delivery is performed when the substitution of drugs is possible and reasonable. __ One of the disadvantages of the "clean" delivery is that it decreases the possible risk of losing the drugs. __ 5. A controlled delivery is carried out when drugs are detected only with couriers. __ 6. Choosing a courier as an assistant in the controlled delivery is as risky as substituting an undercover officer in his/her place. __ 7. All necessary measures must be taken to ensure an undercover officer's safety at all times of risk. __