Complete the sentences with the correct form of the words below.concentration destructive elbow glow infection lifetime measurement sole stride variation1 These high-heeled shoes hurt the __________ of my feet.2 It’s easy to lose your ____________ if you’re very tired.3 I’ve been playing too much tennis. I’ve hurt my shoulder and __________.4 You can increase your resistance to __________, such as colds and flu, by taking regular exercise.5 Modern lifestyles may have a(n) __________ effect on people’s health.6 We should make sure we have enough ________ in our exercise routine to stop us from getting bored.7 He started the walk with a rapid ______, and returned home with a healthy ______ on his face.8 Why not use a pedometer to __________ how far you have walked?9 We should all try to make daily exercise a(n) _______ habit.