Timdapan.com - Tải tài liệu, văn bản pháp luật, biểu mẫu miễn phíĐỀ LUYỆN THI THPT QUỐC GIA MÔN TIẾNG ANHNĂM 2019 CÓ ĐÁP ÁNRead the following passage and mark the letter A, B, C, or D on your answer sheet toindicate 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 istoo (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 forecosystems. Some pine forests need fires for he pine trees to reproduce. The seeds are sealedinside pinecones. Heat from a forest fire melts the seal and lets the seeds (3) _______.Polluting the air, soil, and water can harm ecosystems. Building (4) _______ on rivers forelectric power and irrigation can harm ecosystems around the rivers. Bulldozing wetlandsand c...