WE_____ A STRANGE OBJECT IN THE SKY WHEN WE________ DOWN THE HILL....

25. We_____ a strange object in the sky when we________ down the hill.

a. saw – were driving

b. saw – drove

c. had seen – drove

d. were seeing – were driving

(26-30). Choose the underlined word or phrase (A, B, C or D) that needs correcting.