Companies often argue that their prices take into account research and development costs and that they practice tiered pricing, which allows poorer countries to pay less, subsidized by higher prices in wealthy countries.请问：(1) which 引导的定语从句的先行词是？(2) subsidized修饰...
In particularly wet years, short stretches of an otherwise dry stream-bed may have flowing water because the water table rises to intersect the land surface. 请问老师这句怎么理解，特别是 otherwise 在这句中是什么用法，非常感谢。
I'm going to vist______New York______Los Angeles this summer holiday.请问老师这句话除了either or之外是否也能用both and 和 neither nor?今年暑假我要不去纽约要不去洛杉矶。今年暑假我纽约，洛杉矶都去。今年暑假我既不去纽约也不去洛杉矶。
Shaq found an opening to sell a cheap sneaker of his own.Still, O'Neal believed he could sell a pricier sneaker by himself--but fouled out.请问这里的不定冠词a是起什么作用？是表示类指？泛指？还是非确定特指？另外还想问下这三者是什么关系？我看在章...
What were you doing when you were waiting for the bus?She was reading when I was doing the dishes.She read when she listened to the music.应该用while的吧，但是我网上看到有用when的，老师，可以用when吗？谢谢！
这是一道选择题：1. To think she might have missed the plane.A. It's possible she might have missed the plane.B. She heard that her flight had been canceled.C. It's a good thing she didn't miss her flight.D. She didn't think the passengers would miss her.题目的答案是：C...
...花木兰的海报，上面写着：If tansgender soliders weren't allowed to serve,Mulan could never have saved... 这句话是虚拟语气，if引导的条件从句对过去的虚拟应用过去完成式，那为什么用过去式 weren't allowed 而不是 hadn't been allowed？
...iving the annihilation of wildlife and a rise in global heating, according to
a new study, prompting warnings that humanity is financing its own extinction. 请问老师：句中的driving和prompting作的都是什么成分？prompting是状语吗？但是逻辑主语是谁呢？找不到它的逻...
...living room前面都没有冠词，这种表达可以吗？(2) view of hilltop monument from the bedroom.这里的view和monument前面没有冠词，这种表达可以吗？3. on my way to school，这里school前面需要加冠词a或the吗？
When
I went to college, Mom did all the writing. He just sent checks and a little
note about how great his lawn looked now that I wasn’t playing football on it.老师好，now
that 应该分开看还是合在一起看？如果合在一起对待，now
that “由于”，句子理解无障碍。但...