Trả lời Writing a Lesson 3 – Unit 6 – Tiếng Anh 9 iLearn Smart World.
Câu hỏi/Đề bài:
a. Read about using non-defining relative clauses, then read the article again. Underline the non-defining relative clauses.
(Đọc về cách sử dụng mệnh đề quan hệ không xác định, sau đó đọc lại bài viết. Gạch dưới các mệnh đề quan hệ không xác định.)
Lời giải:
Next on our list is Son Doong Cave. It’s one of the most impressive natural wonders in the world. You can find it in Quang Binh Province, Vietnam.
It is over 9 km long, up to 150 m wide, and up to 200 m deep. An underground river, which runs through the cave, created the cave’s shape millions of years ago.
Overall, it is 38.5 million m3 (cubic meter) in size. This makes it the largest known cave passage in the world by volume. Mr. Hồ Khanh, who is a local man, discovered the cave in 1991. He found it again in 2008, and that was when the world first heard about the cave.
You can only visit Son Doong Cave from January to August. After August, heavy rains, which cause flooding, make it very difficult to get in and out of the cave.
There is only one way to visit the cave. There is a special five-day tour, which has cave experts and tour guides. It’s a challenging but unique experience, which you should try when you visit this cave. However, the number of visitors each year is limited to protect the cave from damage.