题干
By the time they reached the bus stop, the bus__________ for ten minutes.
A：had left
B：have left
C：had been away
D：have been away
答案(点此获取答案解析）
C
By the time they reached the bus stop, the bus__________ for ten minutes.
A：had left
B：have left
C：had been away
D：have been away
，
，“
”是“
”的（ ）
