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

Câu 70. M.L. was of _______ origin.

A. American

B. Asian

C. African

D. European

Đọc 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

change ecosystems. Some changes ____71___ ecosystems. If there is too ____72___ rainfall, plants will not have

enough water to live. If a kind of plant dies off, the animals that ____73___ it may also die or move away. Some

changes are good for ecosystems. Some pine forests need ____74___ for the pine trees to reproduce. The seeds are

sealed inside pinecones. Heat from 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. Bulldozing wetlands and cutting down ___78____ destroy ecosystems. Ecologists

are working with companies and governments to find better ways of ___79____ fish, cutting down trees, and

building dams. They are looking for ways to get food, lumber, and other products for people ____80___ causing

harm to ecosystems.