Question

【题目】—Do you do any sports now?

—Yes, all of us exercise at________least________hour a day in and outside school.

A. the; a B. a; an C. /; a D. /; an

Answer 1

【答案】D

【解析】句意：——你现在做运动吗？——是的，我们所有人每天至少在学校内外锻炼一小时。at least至少，为固定词组；hour ['a]以元音音素开头，前面用不定冠词an，故答案为D。