题干
If we travel a short distance, we should walk _____ taking a bus. Then we'll be greener people.
A：instead of
B：rather
C：while
D：but
答案(点此获取答案解析）
A
If we travel a short distance, we should walk _____ taking a bus. Then we'll be greener people.
A：instead of
B：rather
C：while
D：but
