She is one of the pioneers in the study of behavior. （sex; sexual; sexy; sexist)

A、did not present history in a detailed way.

B、were not primarily intended for the public.

C、were more clearly organised.

D、preserved items with greater care.

Which of the following best describes the shape of the histogram at the above?

A、approximately normal

B、skewed left

C、skewed right

D、symmetric

bridal couple promises each other lifelong 【M1】 ______

devotion. Yet, about one cut of four American

marriages ends in divorce. Since 1940, the

divorce rate has mom than doubled, and

experts predict that, of all marriages that

occured in the 1970s, about 50% will end in 【M2】 ______

divorce. The USA is one of the highest divorce 【M3】 ______

rates in the world; perhaps even the highest.

What goes wrong？ That fact that divorce is so

common in the United States does not mean that

Americans consider marriage a casual, unimportant

rolationship. Just opposite is true. Americans 【M4】 ______

expect a great deal from marriage. They seek physi-

cal, emotional, and intellectual compatibility.

They want to be' loved deep and understood. It 【M5】 ______

is because Americans expect so much from

marriage that so many get divorce. They prefer 【M6】 ______

no marriage at all to a marriage without love

and understanding. Which typical American

optimist, they end one marriage in the 【M7】 ______

hope of that the next will be happier. With 【M8】 ______

no fault divorce laws in many states, it is

easier than never to get a divorce. Some American 【M9】 ______

women stay in unhappy marriages because they

do not have the education or job experience

to support themselves and their children.

But most American women believe that, if neces-

sary, they can make it lonely without a 【M10】 ______

husband. All things considered, Americans

have little reason to continue an unhappy

marriage.

【M1】

A、administrator

B、prototype

C、counterpart

D、forerunner