问题
Why was he late for school yesterday?— He overslept. By the time he got to the bus stop, the bus ________ already ______.
A:has; left
B:had; left
C:was; leaving
D:have; left
B:had; left
C:was; leaving
D:have; left
正确答案是：
同类题型
The number of giant pandas is getting _________ because their living areas are becoming farmlands.
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