...题主语是复数时后面的 than appears 为什么用单数动词（than从句省略主语）分析：You’ll see more if you walk and if you cycle.than is necessary 与 than are necessary辞书质疑(16)：《剑桥英语语法》上的 upwards percolation 用得妥当吗than比较分句省略...
...wright says.
The brain is as active during REM (rapid eye movement) sleep-when most
vivid dreams occur-as it is when fully awake,says Dr. Eric Nofzinger at the University of Pittsburgh.
这两句话最后的says为什么一个在人的后面一个在人的前面，书上说这都是宾语前置，...
...school inside Lucile Packard Children’s Hospital
Stanford (LPCH). “Sometimes I don’t like saying that I’m a teacher,” says Ho.
“People get in their minds an idea of what teachers do, but that’s not really
what it is here.”“Here” is room 386, where each year, about 500 LPCH patien...
...top, ___42___ some of
them looked very anxious and ___43___ (disappoint). When the bus finally
came, we all hurried on board. I got a place next ___44___ the window, so I had
a good view of the sidewalk. A boy on a bike ___45___ (catch) my attention. He
was riding beside the bus and waving his arms...
If you are a real tourist, you probably do not stay long enough for this phase to wear off but go on to the next new location or experience.句中 stay long enough for this phase to wear off 的 for 是表示“为了”还是“对……”的意思？to wear off 是不定式做定语吗？