In China, seasonally-frozen soil and short-term frozen soil affects 54% and 21% of the land area, respectively.这句话用affects对吗，是因为后面加了respectively所以要用affect三单形式吗？
Tony Trivisonno came to America seeking the American Dream.But he didn’t find it—he created it for himself. All he had were 24 precious hours a day, and he wasted none of them. 请问老师，seeking the American Dream.作间隔后置定还是目的状语？谢谢老师。
You can't really avoid talking to the person next to you at the long
tables and guessing what the dishes are certainly provides adequate fuel for
the conversations. 想问下各位老师、朋友，这里为什么用tables？又为什么不用 at the table？二者有何区别？
...around, Bobby wanted to treathis kids and take them to play miniature golf.When they arrived at the golf course, Bobby walked up to thewoman at the ticket counter and said, "How muchis it to getin?"The young woman replied, "$3.00 for you and $3.00 for any kid whois older than 6. We let them in free ...
1）新概念2第79课：I
used to travel by air a great deal when I was a boy. My parents used to live in
South America and I used to fly there from Europe in the holidays. A flight
attendant would take charge of me and I never had an unpleasant experience. I
am used to traveling by air and only on...
您好，老师。最近本人的一个朋友给他的学生讲课的时候，说：This is the only key to unlock the door. 是有语病的，会让人理解成："The key can unlock the door." 而key怎么能做unlock的主语呢？因此是病句。我觉得这句话可以接受，但...
...by 2016, before a modern fiscal system will be built by 2020.
2. 下面的句子是正确的，为什么不用逗号？
She had to give the doorman a tip before (= in order that) he would help her with her suitcases.
她得给看门人小费，好让他帮她提箱子。