问题
单项选择题
American Indian languages, which differ widely, tended to group many units of meaning into multisyllabic words.()
A. all tend
B. and tend
C. to tend
D. tending
答案
参考答案：A
解析：
时态应用。
本句描述一般现象，谓语动词用一般现在时。主语和谓语间不能插入“and”，all在这里作主语的同位语。