问题
选择题
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
答案
C
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。