搜题，就来5TiKU.com题库【问题】 — Has Jack finished his homework yet? —I have no idea; he ____ it this morning.(2.5分)A: was doingB: had been doingC: has doneD: did
— Has Jack finished his homework yet? —I have no idea; he ____ it this morning.(2.5分)A: was doingB: had been doingC: has doneD: did
正确答案：A
题目解析：本题出自武汉科技大学，武汉科技大学大学英语2，由丰阳塔题库搜集整理。
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