原句：when I had seen them before online, I had no concept of these details.（当我以前在网上看到他们，我不知道这些细节。）该句是否可改成：when I had seen them online before, I had no concept of these details.将before 放到online后面？
What time do you start school?Which lesson shall I start with?(1)为什么start接school不需要加介词,而lesson就需要加介词?He started on cleaning the room.He started in business.we'll start in on discussing chemical equilibrium(2) 而加介词时,一会用on、一会用in、一会又...
1、Some of these causes are completely reasonable results of social needs. Others are reasonable consequences of particular advances in science being to some extent self-accelerating问题：不是很懂什么时候要用，什么时候可以用being+名词2、for workers it can mean an end...
To
help battle the pandemic, the administration of President Joe Biden said it
supported waiving some intellectual-property protections for vaccines. Jaws
dropped—along with the share prices of vaccinemakers. 共用drop，下巴掉了，股价下跌。谢谢各位老师！
曹老师端午安康！向曹老师请教如下题目："I wondered
if I could have a word with you." The past tense used in the sentence
refers to a _______.A. past event for
exact time referenceB. present event
for tentativnessC. present event
for unsertaintyD. present event
for politeness此题...
When we feel sad, it's necessary for us to accept sad feelings as part of life. We should learn how to deal with them better than trying to make them disappear.黑体句子中than是rather than省略掉rather吗？翻译是否正确：我们应当学会如何更好地掌控坏心情而不是想方...
They are not a well-trained group of exercisers, _____ rather a class of participants who are mostly homeless.答案为什么填but,有but rather这个用法吗？可不可以填or构成or rather呢？谢谢老师指导！
各位老师大家好，请问下面题目中应选择一般现在时还是一般将来时：Zhouyu ordered
Zhuge Liang to produce 100,000 arrows within 10 days."Three
days_________ enough," said Zhuge.请问各位老师，上面横线处填 is 还是 will be。谢谢！
...50% of international trade. 经济和贸易总量分别占全球总额的60%和50%。The Middle East has about 8 % of the world population. 中东地区拥有世界人口8%的人口.As international relations changed a lot, ……这4个加粗名词（表抽象意义）我感觉都...