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Câu hỏi: Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.
Any change in one part of an ecosystem can cause changes in other parts. Droughts, storms and fires can change ecosystems. Some changes (1) _________ ecosystems. If there is too (2) _________ rainfall, plants will not have enough water to live. If a kind of plant dies off, the animals that feed on it may also die or move away. Some changes are good for ecosystems. Some pine forests need fires for the pine trees to reproduce. The seeds are sealed inside pinecones. Heat from a forest fire melts the seal ans lets the seeds (3)_________. Polluting the air, soil and water can harm ecosystems. Building (4)_________ on rivers for electric power and irrigation can harm ecosystems around the rivers. Bulldozing wetlands and cutting down forests destroy ecosystems. Ecologists are working with companies and goverments to find better ways of (5) _________ fish, cutting down trees, and building dams. They are looking for ways to get food, lumber, and other products for people without causing harm to ecosystems.
The word or phrase which best fits the gap (3) is...
A. out
B. in
C. go
D. fly
Any change in one part of an ecosystem can cause changes in other parts. Droughts, storms and fires can change ecosystems. Some changes (1) _________ ecosystems. If there is too (2) _________ rainfall, plants will not have enough water to live. If a kind of plant dies off, the animals that feed on it may also die or move away. Some changes are good for ecosystems. Some pine forests need fires for the pine trees to reproduce. The seeds are sealed inside pinecones. Heat from a forest fire melts the seal ans lets the seeds (3)_________. Polluting the air, soil and water can harm ecosystems. Building (4)_________ on rivers for electric power and irrigation can harm ecosystems around the rivers. Bulldozing wetlands and cutting down forests destroy ecosystems. Ecologists are working with companies and goverments to find better ways of (5) _________ fish, cutting down trees, and building dams. They are looking for ways to get food, lumber, and other products for people without causing harm to ecosystems.
The word or phrase which best fits the gap (3) is...
A. out
B. in
C. go
D. fly
Một cách logic, khi có sức nóng khiến các mối bít tan chảy thì các hạt bị tắc ở trong trước đó sẽ có thể rơi ra ngoài. Mỗi bít không còn để các hạt ở trong không hợp lý, loại đáp án B. Loại C và D vì các hạt không thể đi và bay. Để các hạt ra ngoài là đáp án phù hợp nhất. Do đó đáp án đúng là A. out.
Tạm dịch: Heat from a forest fire melts the seal and lets the seeds out: Sức nóng từ cháy rừng sẽ làm tan chảy các mối bít và thả các hạt ra ngoài.
Tạm dịch: Heat from a forest fire melts the seal and lets the seeds out: Sức nóng từ cháy rừng sẽ làm tan chảy các mối bít và thả các hạt ra ngoài.
Đáp án A.