Lucy said that she would pay a visit to Beijing in July, ______ ,I think , is a good chance for her to know China.

下列句子横线处依次填入的词语，最恰当的一项是（ ）①他忘不了那一段 的往事，也忘不了曾帮助过他的人。②各高校要在现有基础上， 大学生心理健康预警机制，开设心理健康选修课。③走进国家图书馆那古朴庄严的阅览大厅，任何一个参观的人都会不由自主地放轻脚步，甚至屏住呼吸，以免 公众专注的阅读。④ 投资股票比投资开放式基金风险大得多，还是有不少人选择投资股票。

23 Once you make a promise, you should carry it _____

ters and mobile phones, playgh theyare indeed making our life________and more________have reduced the need forface-to-face cotyr unication.

n never forget the days we spent together in the summer camp.—Well, especially the day it suddenly began to rain in the middle of the night.