A. 450,000,000
B. 4,500,000,000
C. 45,000,000
D. 45.000.000.000
Giải bởi Vietjack
Chọn đáp án B
Dựa vào câu: Scientists believe Earth was formed approximately 4.5 billion years ago.
Dịch: Các nhà khoa học tin rằng Trái đất được hình thành cách đây khoảng 4,5 tỷ năm.
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Earth, our beautiful home planet, is the only astronomica object to accomodate life as we know it. Scientists believe Earth was formed approximately 4.5 billion years ago. It is the fifth-largest planet in our solar system. Its equatorial diameter is about the third-closest planet to the sun. The distance from Earth to the sun is roughly 149,600,000 kometres. It takes 365.3 days for Earth to orbit the sun, and 24 hours to rotate on its axis. The surface temperature ranges from -88 to 580 C. Nearly 70 percent of Earth's surface is covered by ocean, which has an average depth of about 4 kilometres. In 2015 it was estimated that 7.3 billion humans are living on Earth.
Most of Earth's surface is covered by ...
The young boy is taughty. He rides an expensive motorbike.
The young …………
I went to a village school. In fact, there (6) only one classroom for 15 students of different ages, both boys and girls, and one teacher who taught everything. The school didn't have a name, so we just called it our school. We used to walk to school. Some children went (7). At school we learnt to read and to write. We also learnt a little maths and history. There were no science lessons, and we didn't have exams, either.
(8) our school was small, it had strict rules we had to behave ourselves. We stood up and bowed to greet our teacher at the start of every lesson. We could talk only when we were allowed to. However, we had no homework and no extra classes. I had (9) of time to play outside and to help my parents in the house. I loved my school and those school days
