曾看到网友写了以下四个句子，请问都正确吗？1. She is riding a unicycle, singing.2. Singing, she is riding a unicycle.3. Looking above, he saw a plane flying by.4. He saw a plane flying by, looking above.
请教老师这两句的there是代词吗？1. A garden is there to give you pleasure, not to be a constant worry.2. A doctor is there to treat and to cure, not to dismiss anyone as a
hopeless case.
Using online surveys, researchers canvassed nearly 3,000 adults in the U.S., Canada, Iceland, and Australia, examining levels of support for legal measures to address weight discrimination. 研究人员采取在线调查方式，问询了近3000名美国、加拿大、冰岛和...
History can inspire us to learn more. What ' s fantastic about history is
the way it broadens our horizons. It's almost impossible to learn about one historical
period without having dozens of questions about related concept. It can go
anywhere, and there is something in there for absolutely anybody...
1. Girls like cats more than do boys, who as a rule are a cruel lot.2. Girls like cats more than boys do, who as a rule are a cruel lot.请问这2个句子哪个对呀，麻烦老师帮忙回复下谢谢！
句子：If you don’t like the drink you ordered just leave it and try a different one.在这个句子中，one 是指代 drink 吗？但问题是，drink 是不可数名词，那就是说 one 可以指代不可数名词，但这又是与语法书上的说法相违背的。这是为什么？
请分析句子成分，主要是逗号以后部分:It took him about ten minutes to make the trip each time, a delay sufficiently irritating that Obama’s assistant expended considerable effort to avoid it.
More than two million candidates have signed up for the upcoming exam around China, a 13.6 per cent increase from 2016, according to enol.cn.看着像是 more than two million candidates 的同位语，不知我理解对不对。