--May I help you with some jeans, sir?
-- Yes, I’d like to try on those blue ________.

 --May I help you with some jeans, sir?

-- Yes, I’d like to try on those blue ________.

--May I help you with some jeans, sir?
-- Yes, I’d like to try on those blue ________.

1. A.
   pair
2. B.
   one
3. C.
   two
4. D.
   ones

—May I help you with the bag？

—________

1. A.
   Don't worry．
2. B.
   Yes，please．
3. C.
   That's right．
4. D.
   No，you won't．