Faced with a bill for ＄10,000, .
A. John has taken an extra job
B. the boss has given John an extra job
C. an extra job has been taken
D. an extra job has been given to John
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(答案→)A. John has taken an extra job
B. the boss has given John an extra job
C. an extra job has been taken
D. an extra job has been given to John
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