511.Sean has formed the habit of jogging _______ the tree-lined avenue for two hours every day.
A.between
B.along
C.below
D.with
512.Tired,Jim was fast asleep with his back _______ a big tree.
A.in
B.below
C.beside
D.against
511.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。
512.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。