Question

Timmy goes to school ________ every day．It's 5 minutes'walk from his home to school．

1. A.
   in a bus
2. B.
   by plane
3. C.
   on foot
4. D.
   by boat

Answer 1

C
解析：
表示方式或乘坐交通工具的介词短语有：by bus, by train, by air/plane, on foot，一般名词前不用冠词，可以排除选项A；
另外，by plane(乘飞机)一般不会每天上学用到；
by boat“乘船”，也少见；
on foot(步行)每天去上学，比较合乎常理．