513.Sean has formed the habit of jogging _______ the tree-lined avenue for two hours every day.
A.between
B.along
C.below
D.with
514.Tired,Jim was fast asleep with his back _______ a big tree.
A.in
B.below
C.beside
D.against
513.答案是B;根据句意，Sean已经养成每天沿绿荫大道慢跑两小时的习惯。along 沿着。
514.答案是D;against 倚着，靠着；below 在…下方；beside 在…旁边；in 在…里面或者（时间）…之后。
