One news story about the modern Olympics is about men     1     (pretend) to be women to enter the women’s events, People are arguing about how fair     2     is to test woman athletes to make sure they are not men. One side argues that men are     3     (strong), so they will win any women’s event. They say that women should be tested to make sure they are not men. The other side argues that this is     4     (fair)to women. They say skill is more important than strength. But has this ever really happened?     5     answer is yes, several times! The most famous case is that of Dora in the 1936 Olympic Games.

The Olympics     6     (hold) in Berlin, Germany, three years after the Nazis came     7     power. The Nazis wanted to win lots of events, but they had wrong ideas about race. They did not want black or Jewish people in the German team. But many of their best athletes were Jewish. The Nazis did not let these athletes compete. But that meant they might lose events! One event     8     the Nazis thought they might lose was the women’s high Jump. So the Nazis sent a male athlete, Hermann Ratjen,     9       (compete) under the name of “Dora”. Did he win? No. “Dora” came fourth. The     10     (win) was a young Jewish woman from Hungary. She jumped 1.60 metres. “Dora” only jumped 1.58 metres. So men do not always win.

According to a review of evidence in a medical journal, runners live three years     1    (long) than non-runners. You don't have to run fast or for long    2    (see)the benefit. You may drink, smoke, be overweight and still reduce your risk of     3     (die) early by running. While running regularly can't make you live forever, the review says it     4     (be) more effective at lengthening life    5     walking, cycling or swimming. Two of the authors of the review also made a study published in 2014    6    showed a mere five to 10 minutes A day of running reduced the risk of heart disease and early deaths from all     7    (cause).

The best exercise is one that you enjoy and will do. But otherwise…   it's probably running. To avoid knee pain, you can run on soft surfaces, do exercises to    8    (strength)your leg muscles(肌肉),avoid hills and get good running shoes. Running is cheap, easy and it's always    9    (energy).If you are time poor, you need run for only half the time to get the same benefits as other sports, so perhaps we should all give    10    a try.