Zhang Lanping has been teaching for 33 years now, but     1     makes her special is her pair of crutches(拐杖). The courageous teacher from Gansu province     2     ( suffer) from poliomyelitis,   an infectious disease, when she was only one year old.

Zhang is not able to     3     ( full) recover and therefore has to use crutches for the rest of her life. This condition, however, has not weakened Zhang's spirit. As a student, Zhang devoted     4     (she) to acquiring knowledge, which she believed would make her a     5     (success) teacher.

After graduation, Zhang applied as a college teacher but she was turned down because of her physical     6     (disable). Zhang did not give up and     7     (accept) as a primary school teacher in her hometown in Gansu province,     8    then experienced a shortage of teachers. For able-bodied people, it takes only six minutes     9     (reach) school, but Zhang has to spend one hour from home to her work place     10    (use) crutches. Zhang's efforts have not been in vain. The academic performance of her students is among the best in the district.

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.