How silly it is to travel out by high-speed rail _____you can take a plane,whichis much cheaper.A.while B.when C.since D.though答案选B，可是C有既然的意思也能说通为什么不选？
在某书看到以下正误句：误：You can’t use
more words than is necessary.正：You can’t use more words than are necessary.我认为上面第一句也是对的，因为它可以理解为：You can’t use more words than (it) is necessary (that you should use).
It may bring a reprieve for the whale populations currently protected in international waters but at a very high price.这里与but并列的部分是bring a reprieve吗，相当于it may be at a very high price?
...实验室报告交给戴维森博士吗？W: Sure, no problem. Just take care of yourself and
don’t worry about the class. 当然，没问题。好好照顾自己，不用担心上课。 Text 3M: Marie, if no one takes care of your children
while you’re away, Jennifer and I will be glad to have...
... 年高考英语天津卷阅读表达：Mabry works circles around all the students, cleaning up messes others don’t want to touch. He doesn’t expect a lot. Mabry said he hadn’t planned to do much for his milestone birthday, so he was happy the students had prepared the surprise celebration....
When the aerials are down,
and your spirit is covered with snows of cynicism and the ice of pessimism,
then youare grown old, even at 20; but as long as your aerials are up, to
catch waves of optimism, there is hope you may die young at 80.这句话中then youare grown old的语法对吗，这是...
... who eventually turns out to be of high IQ.为什么此处用where引导而不用that？二、现在有两点使这一问题愈发紧迫。原文：Two things make the problem more pressing now.我的：There are&nb...