We enjoyed a wonderful performance last night.
2. 因为大雾，通往南京的高速公路关闭了。(due to)
The highway to Nanjing is/was/has been closed due to the heavy fog.
3. 虽然他并不富裕，但还是尽力帮助贫困地区的学生。(do one’s best)
Though he is/was not rich, he does/did his best to help the students in poor areas.
It is said that Chinese started to use notes/paper money earlier than westerners.
People didn’t come to realize the importance of planting trees until they (had) experienced a number of serious natural disasters.
1. 你为什么不在网上订票? (Why)
Why not / Why don’t you book tickets online / reserve the ticket(s) on the Internet?
I often mistake Wang Hai for his twin brother because they look so similar / very much alike.
3. 对父母而言，没有什么能与孩子的身心健康相比。 (compare)
As for parents, nothing can be compared with their children’s physical and mental health.
4. 自从出国留学后，她就不再和我们保持联系了。 (No longer)
No longer has she kept in touch with us since she went abroad for further study / education.
If you can find whatever learning method (that) suits you, your study / learning efficiency is likely to improve remarkably.