: Đáp án D
According to the passage, which of the followings supports healthy ecosystems?
Which of the followings is the flow of water from the ground to the surface?
It works like a greenhouse, that’s why we call (25) _________the Green House effect.
The word "adjoining" in bold in paragraph 2 is closest in meaning to___________.
According to the passage, what can be learnt about passive students?