注意：此页面搜索的是所有试题
题目内容
（河南城建学院大学英语）
His father was ______ in thought and did not hear the door open.(本题3.0分)
A、 lose
B、 lost
C、 cost
D、 last
A、 lose
B、 lost
C、 cost
D、 last
参考答案
