改错题:The integration of independent states could best be brought about by first creating a central organization with authorities over technical economic tasks.答案是把 authorities 改为authority,请问为什么呢?
Serena Williams' fairytale return from maternity leave fell one match short as she lost to German Angelique Kerber in the Wimbledon finals.请问老师:句子中的 short 怎么理解,fell 怎么理解呢?
thanks to the subsequent media inerest, a few dozen other subjects (including Veiseh) have since come forward and contacted The team at The University of Califonia.
请问这里since是什么用法?
What is clear is the association between good sleep and psychological well-being in older adults. A 2010 study documented that association when it came to sleep quality, but sleep quantity didn't show the same effects.这里A 2010 study documented that association when it came to sleep quality...
Government takes on new importance in one critical respect, namely, setting, and enforcing, rules with respect to contracts and property right.老师好,请问这么多逗号setting, and enforcing, 有什么特别功能吗?