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

[听力原文] 李家为什么要把面先在冰水里浸泡一下？（）

A．使面条更加可口 

B．提高顾客周转率 

C．顾客喜欢吃凉面 

D．能降低原料成本