21. These sessions with a counsellor are ________.
举一反三
- During an academic conference, there will be some activities, like plenary sessions, poster sessions, panel discussions and workshops.
- What are the benefits of poster sessions?
- We owe your name and address ____ the Commercial Counsellor's Office of the American Embassy in Beijing.
- He conducted these instructional sessions with _____ and humor.
- How many sessions are there in the IASA conference?