When asked why he prefers bikes to buses, the professor said, “Riding a bicycle takes half an hour, but it’s more convenient and environmentally friendly. ”
A. absolutely
B. accurately
C. approximately
D. exactly
网友回答
A. absolutely
B. accurately
(答案→)C. approximately
D. exactly
解析：考查副词辨析。absolutely 绝对地 accurately 精确地 approximately 大约exactly恰好，正是 根据句意：骑自行车需要花费大约半小时，但更方便更环保。