地质构造（构造形迹）
参考答案：
指的是地质体（组成地壳的岩层和岩体）在地球内、外力地质作用下所发生的变形（形态变化与位置变化）。
— Bob! How is your project? I heard you started it last Friday, right?
— Oh! I_____ for it. But I haven't decided when to do it. [ ]
A. have prepared
B. had prepared
C. have been preparing
D. was preparing
（）、（）是确定学生知识和能力基础的有效方法。
