单选题 The author of the report is well familiar with the problems in the hospital because he has been working there for many years.

A、 acquainted
B、 informed
C、 enlightened
D、 advised

【正确答案】 A

【答案解析】句意：该报告的作者很熟悉医院的这个问题，因为他已经在那里工作多年。be familiar with熟悉。与be acquainted with同义，二者可相互替换。inform通知。be well informed of (about)对……消息灵通。enlighten启发，启蒙。advise通知，提议。因此，本题的正确答案为A。