After 20 years of marriage, a husband may still not understand his wife. How is it that sh

e is never at a【C1】______for words？ How can she【C2】______the names of a couple they met on【C3】______years ago？ Now we know【C4】______to tell him: it's her brain.

Although there are obviously cultural【C5】______for the differences in emotions and behavior,【C6】______breakthrough research reveals that the【C7】______of many puzzling differences between men and women may【C8】______in the head. Men's and women's brains【C9】______much in common, but they are definitely not the same【C10】______size, structure or insight. Broadly speaking, a woman's brain, like her body, is ten to fifteen per cent smaller than a man's,【C11】______the regions dedicated to language may be more densely【C12】______with brain ceils.

Girls generally speak earlier and read faster. The reason may be【C13】______females use both sides of the brain when they read. In【C14】______, males rely only on the left side.

At every age, women's memories【C15】______men's. They have a greater ability to【C16】______ names with faces than men do, and they are【C17】______at recalling list. The events people re- member best are those that an emotion is attached to.【C18】______women use more of their right brains, which【C19】______emotions, they may do this automatically.

While we don't yet know what all these findings imply, one thing is【C20】______: male and female brains do the same things, but they do them differently.

【C1】

A．slip

B．puzzle

C．loss

D．failure