问题补充：
it is not far from my home to school, I usually ride my bike to school.
A. Because, so
B. Because , /
C. /, because
D. So ,because
答案：
A. Because, so
(答案→)B. Because , /
C. /, because
D. So ,because
解析：此题重点考察because和so 的区别。because只能放在句子中间,在它之前的是结果,后面的是原因. so做所以解释时也是放在句子中间,在它之前的是原因,后面的是结果.
