-----Excuse me. Where is the museum?-----It is quite far. It will take you half hour to g

问题补充：

-----Excuse me. Where is the museum?

-----It is quite far. It will take you half hour to go there by bus.

A. an; /

B. an; a

C. a; /

D. /; /

答案：

(答案→)A. an; /

B. an; a

C. a; /

D. /; /

解析：句意：----劳驾，博物馆在哪里？---相当远的。乘坐公汽到那里将会花掉你半个小时。Hour是以元音音素开头的单词，所以前面必须用不定冠词an;在表示某种交通方式的时候，bus\bike\train\plane等名词前不要任何修饰成分。故选A。