In 1984 , an economics professor willian lazonick joined the faculty at Harvard Bussiness School , just in time to witness a shift in economic thought .问：句中红色两个介词能否均换成of ， 能说明下原因吧？
...o work in offices are frequently referred to as "white-collar workers'
for the simple reason thatthey usually wear a collar and tie to go to work. Such is human
nature, thata great many people are
often willing to sacrifice higher pay for the privilege of becoming
white-collar workers. 2）新概...
Li lost her mother at three. Four years later, her father became paralyzed after a tractor accident. At 12, her misfortune returned with the death of her grandma.这里面的 returned 什么用法？如果换成 go 或者 appear 有何不同？
New Yorkers waited at newsstands for the morning papers to arrive while anxious relatives gathered at streetside morgues holding pictures ofthe disappeared.译文: 纽约市民在报摊边等着早报到来，焦急的亲属们聚集在路边停放尸体地方的周围，手里举着失踪者的照...
Behind the rotundathe slender tree with yellow leaves
down drooping.
我能感觉到drooping是修饰down的，对down进行补充说明，或者做方式状语。请问对单个副词进行修饰，还可以说这里的现在分词作状语吗？还是作副词down的同位语?
谢谢！
原文第一段：The Hertz, Corporation, the U. S. Air Force, Hyatt Hotels Corporation, the City of Dallas, and the Neiman-Marcus Group, Inc. , have one thing in common — all have purchased the services of Feedback Plus. Feedback Plus is an agency that dispatches professional shoppers who pose as...
For example, during past ice ages, glaciers advanced down through North Americaand Europe and gradually cut off parts of populations from one another.advanced down在这里是什么意思？
...r him because he has been ill. 你应该体谅他, 因为他一直病着。The company went bankrupt because it couldn’t sell its products. 那家公司因产品滞销而破产。John did not take the job because it was a blind alley. 约翰没有接受那份工作，因为那是一份没有前途...
...全国卷Ⅱ-完形填空 Like
many young people, Jessica wants to travel the globe. Unlike most ofthem, this
25-year-old is doing it full-time. She and her husband have spent the last two
years traveling the world, stopping everywhere from Paris to Singapore. It
might sound like one long, expensi...
...ce we were children. 我们从小认识。They’ve
moved twice since they got married. 他们结婚后已搬了两次家。这类句子的主句通常用现在完成时。但是，当主句表示一段时间时，可用一般现在时代替现在完成时。如：It’s
a long time since we met las...
...entors will be able to perfect powerful customized chips over a weekend attheoffice -- spawning a new generation of garage start-ups and giving the U.S. a jump on its foreign rivals in getting new products to market fast.米德预言发明者可以在办公室用一个周末的时间生产完美...
Caffeine was a frequent ingredient in these concoctions, presumably because, in part at least, people had become accustomed to the stimulation that coffee and tea provided.in part at least 在句中的成分？
...ue light is responsible for accelerating aging in fruit flies, we compared the levels of metabolites in flies exposed to blue light for two weeks to those kept in complete darkness.句中compare的比较对象不一致，请问这样是否正确。2. 之前请教过类似的问题：https://www.cpse...
That smartphone sales have peaked, and seem to be levelling off ataround 1.4bn units a year, is good news for humanity. 这里的 a year是做定语修饰around 1.4bn units吗？感觉不是修饰谓语动词 level off 的。