CPE USE OF ENGLISH- GAPS

CPE

http://www.examenglish.com/cpe/cpe_use_of_english_part1.htm

Men and women are often considered to be completely at odds with each other, in terms (1)  their attitudes and behaviour. Not so when they are in love, new research has discovered. As far as their hormone levels are (2), when men and women are in love, they are more similar to each other (3)  at any other time.

It has (4)  been known that love can (5)  havoc with hormone levels. For example the hormone cortisol, (6)  is known for its calming effect on the body, dips dramatically when one person is attracted to (7) , putting the love-struck on a par with sufferers of obsessive compulsive disorder.

But a new study has found that the hormone testosterone, commonly associated with male aggression, also falls when he is in love. In women, it's quite the (8) . Testosterone levels, which (9)  to be lower among females, rise towards (10)  of the male.

Donatella Marazziti of the University of Pisa, Italy, (11)  this down to nature attempting to eliminate the differences between the sexes. (12)  doing so, they can concentrate fully (13)  reproduction.
This suggestion seems to be supported by the fact that (14)  couples in a long (15)  relationship, nor participants in the study who were single at the time of the experiment, exhibited such changes.