问题 do manage a little sight-seeing意思理解

the playgoers do manage a little sight-seeing along with their playgoing这句话不明白，如何理解？句子中的 do manage a little sight-seeing是什么意思呢？

问题 a matter of 是不是大约的意思？红色部分在句子中作什么成分？

The differences in athletic performance might be not very large,a matter of noly a few percent.

问题 当前一句出现two，后一句是用a还是one

Every “Number of freeze-thaw cycle” in the table corresponding to two samples including a/one parallel sample.表中每一个冻融循环次数对应两个样本，包括一个平行样本，我是想问这里的一个，用a好还是one好？我是想前面用了two后面是不是用one好一...

问题 句子翻译（倍数问题）

...位的竞争很激烈---- 今年的求职者是去年的五倍。The competition of finding these jobs/positions is very fierce---后半句的格式有很多，以下都正确吗？1. The applicants this year are five times more than (the ones/that) last year. 括号里的成分都正确吗？可以...

问题 ​As a board member for/of....

As a board member for the Internet Security Research Group, she always has her pulse on the industry.这里为什么用for而不是of呢？

问题 ​As a board member for/of....

As a board member for the Internet Security Research Group, she always has her pulse on the industry.这里为什么用for而不是of呢？

问题 lead a happy life是否为同源宾语

老师好：请教一下。张道真语法书上在介绍主谓句型的时候，举例说明了某些词汇可以跟同源宾语。They are leading a happy and peaceful life now 中是否存在同源宾语？

问题 good exercise与a good exercise

Swimming is supposed to be _____ very good exercise for older people. 这里到底能不能加不定冠词a？有的人说能加不定冠词，有的人说不能加不定冠词。请教各位。谢谢！

话题 every once in a while

话题 be in for a shock

话题 a full-fledged home

话题 A King in New York

话题 a little bit late home

话题 a home away from home

话题 One student in a hundred