It may come as a surprise to many an exhausted mother or father--but thinking about your children could improve your memory,a study suggests.这里的 an 和 but 要怎么理解？
一道时态选择题—— you play badminton very well！——many thanks! when in university, i ______ it for four years.A. learned B. have learned C. had learned D. would learned答案为A，C为什么不行，再过去一段时间应该对现在造成影响啊？谢谢
Upon its completion in 2025, the HuajiangCanyonBridge
will be the world's highest as measured from the water surface — spanning a
massive gorge in southwestern China.大意知道，但是，句中的as是什么词性，什么作用？辛苦专家老师分析以下句子结构。
麻烦老师解答一下：Whatever
you don't like done to yourself, don't do it to others. 这句话中like
后面的done 是什么词性？什么用法？done
是形容词修饰whatever吗？把这句话还原是否是：you
don't like whatever done to yourself?
Pushed by polls that show health care is one of his main domestic problems and by forecasts showing that the retiring baby-boomers(生育高峰期出生的人) will crush the government's finances, George Bush is expected to unveil a reform plan in next week's state-of -the-un...
In one sense ， I was the archetype of the ghetto child who through hard work and initiative was pulling himself toward a better life.想请问一下 第二个was是什么意思？ 是多余的吗
The cartoonist aimed to remind us of the phenomenon that parents excessively spoiling their children may cause the latter weakness and helplessness.不理解parents spoilling的用法。
...语，其中的问题很多：首先这个地方I found the letter in the kitchen.可以解释为The letter was in
the kitchen when I found it.既然前面章振邦《新编高级英语语法》P636，都可以把the boy under 18 的under 18看成无动词分句，为啥这个地方夸克没这样...