“Woman” becomes “ Frau” in German, “femme” in French and “f ùnǔ” in Chinese. This example shows that in different languages the same concept can be represented by different ______ .

Idiomsnominalinnaturehavea(n)______asthekeywordineachandfunctionasanouninsentences.

A mong the following words, “ ______ ” does NOT have inflectional affixes.

One can figure out the meaning of “ airmail ” to be “ mail by air ” by its ______.

If you try to learn too many things at a time, you may get ________.