— Have you seen empty box?
— Do you mean box you showed to me yesterday? I put it in your schoolbag.
A. a, the
B. an, a
C. an, the
D. the, a
网友回答
A. a, the
B. an, a
(答案→)C. an, the
D. the, a
解析：第一次提到某物时，用不定冠词，又根据empty 的第一个音标为元音音标，故选an，当第二次再提到该物时，用定冠词the ，故选C