...dent Assessment (PISA), a triennial test of 15-year-olds around the world, and the Trends in International Mathematics and Science Study, which measures ten- and 14-year-olds.ten- and 14-year-olds.是"10-14岁的孩子"还是"10和14岁的孩子"？谢谢老师。
That “old” would vary between nations makes sense, especially between more and less developed countries, with differences in education, death rates, access to health care and life expectancy.大概的成分分析，不太理解后边especially和between and为什么一起搭配?
A tiger marks the boundaries of its territories by spraying urine and other bodily liquids on bushes. But it tries to avoid territorial fights, being guided by the distinctive body smell of other tigers.请问红字部分怎么理解？
...更新）▲P15▲between teenagers and parents 的说法对吗▲P16▲once可以用作形容词作定语吗rate to 是什么用法▲P17▲the
key to doing sth 与 the
key to do sthand that 引导什么从句▲P18▲feel 是及物动词还是系动词(feel
the same way)▲P19▲a
group of que...
Although the woods are so attractive and luring the speaker to stay forever. But after the harsh struggle, the speaker has made his decision that he has responsibility to fulfill in the real world andit is not the time for him to rest.请问：句中的although是否要删去（因为后面有but...
...oom—a women's group that had invited me to join them. Throughout the evening, one man had been particularly talkative, frequently offering ideas and anecdotes, while his wife sat silently beside him on the couch.译文：有一个女性团体在佛吉尼亚郊区的一间会客室里举行了...
...now volunteers to help kindergarten students with reading two days a week, and
on a third day, he instructs the school’s first-
and second-graders. After dropping the kids off at school, of course. Every
child looks up to Cruse, both on and off the school bus. “Herman is super
positive and he’...
...t that took a shorter path returns first, its pheromone trail is stronger, and other ants will follow it, according to rule 2.Because an ant that took a shorter path returns first.这句是原因状从吗？that这里是不是做介词-那样的。 took是V，那么returns是什么成分呢？...