—How far is it from your home to the school? —Half ____

试题详情及答案解析: —How far is it from your home to the school? —Half _______ hour’s walk.
A. a B. an C. the; 答案：B; 试题分析：句意：你家离学校有多远？半个小时的步行路程。hour中的h不发音，以元音因素开头，所以用不定冠词an,故选B。
考点：考查冠词的用法。