it takes a particle to tunnel through a barrier increases with the thickness of the barrier until tunneling time reaches a maximum; beyond that maximum, tunneling time stays the same regardless of barrier thickness. This would imply that once maximum tunneling time is reached, tunneling speed will increase without limit as barrier thickness increases.

这道题是嵌入式关系分句结构吗？spending引导伴随状语就近修饰see?

“identical, on average”不等同于"always remains constant"

USHER：to take or show sb where they should go。及物动词，排除ABC

“decline at” is unidiomatic

From Ron：you can use "that of Y" in parallel to either "NOUN of X" or "X's NOUN".

From Ron：
第二个and 后面有没有that都对，“as long as you can find the corresponding structure in the other part, then the parallelism is fine”

the passive voice is indeed a problem, because it's unnecessary. (remember that the passive voice should only be employed when there's a fairly compelling reason to use it.) in choice b especially, there's also an unacceptably long distance between the passive-voice action (will be greatly reduced) and the agent of that action (by the ...).

one thing you should definitely notice in choice c is the wordiness of 'the government's prediction is'. constructions like that, which can easily be replaced by more compact forms ('the government predicts') with no change in meaning, are ALWAYS wrong. (also, you need the word 'that' after 'is'.)

found in Puerto Rico in 1991和dated at 34 million years old修饰的都是fossils.

非常tricky！！！！ 有former都不对，不能做18年的前主席

as many as 不能和 as compared to 写在一起，造成重复

cut的原型，分词，和过去时均同型!!

同位语，见RON解释：http://www.manhattangmat.com/forums/post35386.html#p35386

是pulsar被observed，discovery被announced

定语和状语

考虑影响export的因素——需求or供给

要看清题目结论是在说，major eruptions

expect sb to do sth，跟allow很像；而expect that一件事的时候就不是关乎具体的人做事了。这里A和B的区别就是，不是女性被期待，而是大部分学生群体被期待

by failing 修饰动名词engaging；动词含义名词形式也可以被状语修饰。