老师们好，句子最后perhaps catastrophically so中，so指什么呢？But there is a risk that such changes will make some plant infections more common in all climatic zones, perhaps catastrophically so.
The company which was created in the summer of 1999 would not have many of the same men left by the time the company celebrated the 20th anniversary celebration.以上句子修改自一本英文书籍中的句子。这个句子里the same men后是否省略了“as the company created”？单单一...
our mind liking, unless actively prompted, to reduce most of what we have been through to headings rather than the full story, a document which it shelves in remote locations of the inner library.这里a document是our mind liking 的同位语嘛？还想请教一下，同位语可以指代句子，...
_____ has been stated in the annual white book,our national defense budget per year is well below the average of develpoed countries.选项是as ,如果我想用as it has been.......这个句型，不是as引导的非限制定语从句，原句子怎么改？
Beard helped out to create the goal of his life, allowing him to weave past five England players, trick the goalie with a dummy—tic—and put the ball in, tac.请问这里的trick和put为什么用动词原形?是不定式的省略吗？可这是三个不定式并列啊?
语法The old man satin front of
the television every evening, happy to watch...这里为什么用sat 不是 sitting？是不是有错误？如果无误，那么这是什么用法？做什么成分呢？还有这句话里逗号是个什么意思？是为了防止句子歧义吗？
The boy wanted to ride his bike in the street but his mother told him
not to.1.祁使句变间接引语，句型不是tell sb (not) to
do sth吗，为什么后面不是but his mother
told him not to do?2.She warned her son never to drive after drinking.句型是warn sb not to do
sth,never和not都...
...ied of heat stress, brought on, he suspected, by the problems with the heating system in the building--but their spleens were weirdly enlarged.请教一下suspect的内容是整个句子（They appeared to...）还是brought on这一部分？个人感觉更像是brought on这一部分，此处的he ...
Tea wasn't introduced into Europe until the early 17th century. And now it has _______ popular in Europe and America.这道题给的答案是become，请问可不可以用been呢？如果不行，为什么呢？