选择正确的词填空
ill,sick
Tom wanted to stay away from school，so he pretended that he fell____that morning.
用所给形容词的适当形式填空
The ____（old)writer has never again wtitten so____（good）a book as his first one.
这里old应该用什么形式?
If we decide that language did originally develop, possibly involving
from animal communication, we can only do so by assuming evolution to be a
universally valid principal. 这句话改错说把by去掉。请问老师so这里指代什么，不去掉by好像也翻译的通。
1. Whom would you rather _______ the work?
答案是have do。我写的是have to do。为什么啊？
2. What’s troubling them is _______ enough experienced workers.
答案是their not having。我写的是not their having。为什么啊？谢谢！
Closed to outsiders for five decades, Burma, also known as Myanmar, is something of an unknown quantity, particularly in terms of its natural riches.请问：句中的 is something of 是什么意思？
Of course, if we get down to the molecular level, at some point dividing the stuff will not result in smaller portions of muds, but rather the component parts of mud (water, silicates, decomposed organic material).请问这段话是什么意思？
Some research indicates that as perceived buttock size increases, men feel more attracted to women这里的perceived是做adj修饰buttock size，as引导的状语从句吗？而不并是像这以下这一句as引导的非限制性定语从句对吗？He is nice, as was mentioned before = He is nice...