LAN LIVES ON A FARM. SHE ... A TRAFFIC-JAM BEFORE SHE WENT TO THE...

49. - 70 TESTS LEVEL A
70 TESTS LEVEL A

49. Lan lives on a farm. She ... a traffic-jam before she went to the city last

month.

a. did not see

b. were not seeing

c. had never seen

d. has never seen

 c