20. His father was ______ in thought and did not hear the door open.(本题2.0分)
A、 lose
B、 lost
C、 cost
D、 last

答案是:

B
出自  青书学堂  >  长春工程学院-大学英语3(专升本)

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本题添加时间:2023/4/3 12:59:00