Đáp án B
Raise: nâng lên
Rise: tăng lên
Drop: rơi
Fall: ngã xuống
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.
Which of the following is NOT mentioned in paragraph 3 about earthquakes?
When (27)_______ visual signals are not possible, more formal signals may be needed.
He felt that if people could be shown a better way of living then maybe they would be interested enough to try to protect their (24)__________environment.