题目

给《绝句》断句绝 句杜 甫两个黄鹂鸣翠柳，一行白鹭上青天。窗含西岭千秋雪，门泊东吴万里船。 答案：绝句两个/黄鹂/鸣/翠柳，一行/白鹭/上/青天。窗含/西岭/千秋雪，门泊/东吴/万里船。 I want to know how long ________． [　　] A．has he been back B．has he come back C．he has been back D．he has come back