3. (2014 •毕节模拟) Her mother goes to work bus every morning.
A. by B. at
C. on D. in
3. A
3. A 解析:by后接交通工具类名词，且无需限定词修饰。
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3. (2014 •毕节模拟) Her mother goes to work bus every morning.
A. by B. at
C. on D. in
3. A 解析:by后接交通工具类名词，且无需限定词修饰。
