托福考试

【单选题】
A、To describe ways pests can damage plants
B．To examine the life cycle of caterpillars
C．To explain how com plants develop
D．To describe how a natural pesticide works

网考网参考答案：D
网考网解析：
What’’s the main purpose of the talk document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>