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
解析：。根据“分词作状语其逻辑主语应与句子主语一致”的原则，只有A才是对的。