The physical differences between men and women can be ______ directly to our basic roles as hunters and child-bearers.

单项选择题Sadly, as spending on private gardens has ______, spending on public parks has generally declined.

单项选择题（8）处应填写（）

A．before
B．while
C．until
D．when

单项选择题（7）处应填写（）

A．last
B．first
C．later
D．finally

单项选择题This passage suggests that an individual s I. Q. （）.

A．can be predicted at birth
B．stays the same throughout his life
C．can be increased by education
D．is determined by his childhood

单项选择题（6）处应填写（）

A．so
B．as
C．and
D．but

单项选择题The passage is most probably taken from （）.

A．a letter to the editor
B．a comment on a novel
C．an introduction to a dictionary
D．a news-report in the newspaper

单项选择题（5）处应填写（）

A．bill
B．accounts
C．fees
D．fare

单项选择题The case history of the twins appears to support the conclusion that （）.

A．individual with identical brains seldom test at same level
B．an individual"s intelligence is determined only by his environment
C．lack of opportunity blocks the growth of intelligence
D．changes of environment produce changes in the structure of the brain

单项选择题The purpose of removing difficult words in the examples is to （）.

A．make them easier to understand
B．provide more useful words
C．introduce more contexts
D．include more examples

单项选择题Many experts do not believe that （）.

A．there are still some problems to work out
B．there will be competition to get popular addresses
C．companies are willing to change their web addresses
D．the change will affect the use of the Internet greatly