问题补充：
He looks forwards every afternoon to the flower-lined garden.
A. visit
B. paying a visit
C. walk in
D. walking in
答案：
A. visit
B. paying a visit
C. walk in
(答案→)D. walking in
解析：考查动名词做宾语：look forward to盼望，to是介词后面接名词或动名词，B项缺少介词to，用walking in符合句子搭配。句意：他期望每个春天都能在那个花朵排成线一样的花园里面散步。选D。
