A. competition
Đáp án A
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.
According to the passage, what can be learnt about passive students?
According to the passage, to learn new information, low-achieving students do NOT______.
The word "adjoining" in bold in paragraph 2 is closest in meaning to___________.
When (27)_______ visual signals are not possible, more formal signals may be needed.