M1: Language Usage

Key Answer

Exercise 1:

  1. a. would buy
  2. a. difference in price
  3. b. return

Exercise 2:

  1. b. goes to
  2. c. please do
  3. c. could i get
  4. a. low
  5. b. did you sell
  6. a. credit card
  7. b. ATM

Exercise 3

  1. a. could
  2. b. can
  3. b. could
  4. a. could 
  5. c. was able to
  6. c. be able to
  7. c. been able to 
  8. c. be able to
  9. a. can
  10. b. be able to