M.L. WAS OF _______ ORIGIN. A. AMERICAN B. ASIAN C. AFRICAN D....

Câu 70. M.L. was of _______ origin. A. American B. Asian C. African D. EuropeanĐọc kỹ đoạn văn sau và chọn phương án đúng (ứng với A hoặc B, C, D) cho mỗi chỗ trống từ 71 đến 80.Any change in one part of an ecosystem can cause changes in other parts. Droughts, storms and fires can changeecosystems. Some changes ____71___ ecosystems. If there is too ____72___ rainfall, plants will not have enough water tolive. If a kind of plant dies off, the animals that ____73___ it may also die or move away. Some changes are good forecosystems. Some pine forests need ____74___ for the pine trees to reproduce. The seeds are sealed inside pinecones. Heatfrom a forest fire melts the seal and lets the seeds ____75___. Polluting the air, soil, and water can harm ecosystems.Building ____76___ on rivers for electric power and irrigation can harm ecosystems ____77___ the rivers. Bulldozingwetlands and cutting down ___78____ destroy ecosystems. Ecologists are working with companies and governments to findbetter ways of ___79____ fish, cutting down trees, and building dams. They are looking for ways to get food, lumber, andother products for people ____80___ causing harm to ecosystems.