— ______ have they stayed in our school?
— For twelve years.

A. How long
B. How often
C. How soon
D. How many
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科目:初中英語 來源:月考題 題型:單選題

— ______ have they stayed in our school?
— For twelve years.
[     ]
A. How long
B. How often
C. How soon
D. How many

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