Ⅱ. Vocabulary and Structure (15 points)
Directions: There are 15 incomplete sentences in this section. For each sentence there are four choices marked A, B, C and D. Choose one answer that best completes the sentence and blacken the corresponding letter on the answer sheet.
6. She looks forward every spring to ______the flower-lined garden.

A. walk in
B. paying a visit
C. visit
D. walking in