Do you know a spaceship flies at about nineteen kilometers second? A. the B. a C. / D. an 题目和参考答案——青夏教育精英家教网—

题目内容

Do you know a spaceship flies at about nineteen kilometers ________ second?

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

【答案】

【解析】句意：你知道宇宙飞船以每秒十九千米的速度飞行吗？结合语境可知本句中泛指任何一秒，故用不定冠词。Second词首音素是辅音，故不定冠词用a，选B。

考点：考察冠词

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