By the time they reached the bus stop, the bus__________ for ten minutes.
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A
had left
B
have left
C
had been away
D
have been away
推荐题目
 Smoking ________ your health. 
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A
isbadfor
B
isgoodfor
C
isgoodto
D
isbadto
He ____every evening.
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A
do homework
B
does her homework
C
do my homework
D
does his homework
Robots are _________ to do the same things _________ people.
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A
enough clever; as
B
clever enough; with
C
clever enough; as
D
enough clever; with