题目命制的覆盖面要看题目的效度，即题目是否真正反映了要考察的能力点；主要是通过测试，对题目的效度指标进行分析来验证。
参考答案：对
Now Mary ____to feel a little tired after climbing. [ ]
A. seem
B. seems
C. seemed
D. seeming
Many plant and place names such as “poker” and “Mississippi” in American English come from ______.
