Question

7. Sue…dinner when she heard a knock on the door. b. was having 7. Sue c. has been having d. has had
9. Yesterday, I met an old school friend who I…for years d. hadn't seen c. had seen a. didn't see b. haven't seen
11. Nancy…since she came from work. b. is sleeping d. had slept c. slept a. has been sleeping
13. You…the salt after the meat is cooked. d. have added c. add a. are adding b. will add
14. I…two letters so far. a. have written b. wrote d. have been writing c. had written

Answer 1

7 b 9 d 11 a 13 c 14 a