题目内容
―Kathleen, Mr. Heller is waiting for you outside.
―Just a second. I'm on phone.
A. a; the B. /; the C. a; / D. /; /
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题目内容
―Kathleen, Mr. Heller is waiting for you outside.
―Just a second. I'm on phone.
A. a; the B. /; the C. a; / D. /; /