4.I’ve always been very (谨慎的) about giving my address to strangers. 5.I must (道歉) for the delay in replying to your letter. 6.Some of his ideas are completely (把……分开) from reality. 7.He was always surprisingly (谦虚的) abouthis role in the organization. 8.The year 2009 is the 60th (周年纪 念日) of the PRC. 9.He had done a lot of (预先的) planning before he went to apply for the job.

cautious

apologize

divorced

modest

anniversary

advance