要求：请根据题干信息在空白处填写专有名词类词汇或短语，答题时请注意其语法形式（单复数、语态时态）。

2. Doping does help the athletes to perform better, however, it is against the principle of equality which is a core philosophy of the Olympic spirits. Therefore, the _____ _____-_____ _____ is in charge of finding the cheaters and giving them harsh punishment such as suspension of the right to take part in major sports events.

3. Dr. Henry _____, then the national security advisor to President Richard Nixon’s secret envoy, flew to Beijing in 1971 and paved the way for the official establishment of diplomatic ties between China and the US.

4. During   _____, students will make colorful painted eggs and celebrate the rebirth of Jesus Christ.

5. If you describe something such as a machine or system as user-_____, you mean that it is well designed and easy to use. Idiomatically, some people would say that it is idiot-proof: even a stupid person without any prior knowledge to this thing can use it without a handbook or instruction sheet.