The behavioral sciences has been slow to change partly because the explanatory items often seem to be directly observed.既然名词修饰名词作定语，表示分类、类别、用途等，这里的 behavioral 可以改为 behavior 吗？即 behavior sciences 表示行为一类的科学。
Casual workers are usually paid ______ the hour.
A. by B. on C. to D. with
答案是 by。但为什么不能是 on 呢？on the hour 的搭配我也见过。如：
A bus leaves for New York on the hour.
...fore has our nation enjoyed so much prosperity and so much social progress with so little internal crisis.我知道这里是否定副词 never 在句首导致了倒装，那这里 before 是什么词性呢？为什么一定要把 before 也倒装呢？为此我查了柯林斯词典，其中一条说...
...rk词条，有：a : to indicate (a location, such as a location on a map) with a mark or symbol X marks the spot where the suspect was last seen. 根据上面的解释和例句，似乎可以这样：1a. X marks the spot where the suspect was last seen.1b.X marks the spot on the ma...
It is their duty to witness the horrors of the world and record them,however terrible and unpleasant they may be.
这里的however可以用althought或者despite替换吗？都是表示让步，为什么这里只可以填however呢？
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...
How many of us ____, say, a meeting that is irrelevant to us would be interested in the discussion?A. attendedB. attendingC. to attendD. have attended这个题目的答案是选择B，现在分词作后置定语，how many of us与attend是主动关系。我现在想问的是：这个句子可不可...