"Are these shoes discounted?"
October 5, 2018
For the first question, yes.
For the second question, also yes. However, you can neglect the word "pair" if the context is clear to the listener/reader. For instance,
- 这双: This pair (no item specified)
- 这双鞋子: This pair of shoes/shoes (Commonly thought as shoes relatively)
October 6, 2018