1. The ______ (符号) on the packet is a guarantee that the food has been produced organically.
2. Tickets may be ______ (购买) in advance from the box office.
3. If you send the application form in a straight way, I can ______ (保证) you an interview.
4. Younger workers tend to be at an ______ (优势) when applying for jobs.
5. Her drink problem has forced her to ______ (退休) from public life.
