...but he has openly
admitted that he has a seldom seen dark streak,telling the CBS News.中文翻译是“他承认有罕见的暗黑一面”，我查字典中streak可表示不良性格含义，句子当中单词seen的位置似乎表示seen这里应该是形容词性，可是我查字典中seen只...
上面的句子来自2019版人教版高中英语新教材必修一的 Unit 5（p60）。How many billion people speak the UN’s official
languages as their native or second language?句中用 billion 是为了表示“多”吗？去掉也可以吧？
Based on recent researches, distance learning slowly proves as valuable as the traditional campus-based form.该句中 based on 这里是独立成分吗？还是状语从句的省略？如果是状语从句的省略？如何还原？
Packaged foods are manufactured outside the home for purchase. This can be as simple as a butcher preparing meat, or as complex as a modern international food industry.其中的 as simple as 第一个 as 做副词，第二个 as 做连词，做比较状语后面 as complex as 相同？as s...
...ents who have individual public accounts on WeChat, 5 percent claimed that they had built popular "self-media" brands using their accounts, while 12.2 percent said they had made money from the accounts through advertising.这个句子是用 among 还是 of ？还是两个都能用。
When invited for a meal, you might ask, "Can I bring anything?" Unless it's a potluck, when/where everyone brings a dish, the host will probably respond, "No, just yourself." potluck作先行词，关系词用 where 还是 when？
...，从句的时态要后退，下面的句子
我不能理解：I checked the orders instantly. That’s when
we realized we made a mistake.犯错误这个动作发生在 realized 之前，为什么不用过去完成时？我了解主句是said，told 那种，但是像 realized 这种，如何...
take+sb/sth + adv./prep. We'll take the matter forward at our next meetingcarry something + adv./prep. I never carry much money on me.请问老师加粗部分是作状语还是补语？是结合具体句子充当成分不同还是这个结构里充当固定成分？