For this part, you are allowed 30 minutes to write a short essay entitled The Phenomenon of Empty Nest. You should write at least 150 words following the outline given below. 注：“空巢老人”指那些到了退休年龄，身边却无子女与之共同生活的老人。 1．如今的空巢老人逐渐增多 2．这种现象出现的原因 3．如何解决由此带来-的问题