For questions 1-15, read the text below and choose the word which best fits each space.

As the twenty-first century (0) ..........., it seems that more and more people are leading increasingly hectic and stressful lives. This leaves little, if any, time for (1) .............. activities. All too often, it appears that any interest that we may have in sporting activities will (2) ................ when our lifestyle becomes more stressful, but many people (3) ................ to realise that a few hours put aside to enjoy a sport each week can actually (4) ............. stress levels. Another (5) ................ that is associated with (6) ............ a sport is a general improvement in health. This, in turn, can lead to weight (7) ........... , due to the fact that fat is (8) ............. when our heartbeat (9) ............ above a certain level. However, as with everything, there are certain drawbacks to taking (10) .............. in a sport, the main one being that it can (11) ............... to serious injury. The main reasons for this are that we have not taken the time to warm up properly or that we are not properly supervised in our chosen sport. In addition, it is very easy to (12) ............. the heart if exercise is suddenly taken up after not having participated in any form of (13) ................ activity for a long period of time. Taking all this into account, sporting activities can be extremely beneficial to our health provided they are (14) ............. out with care and under correct supervision and are not (15) ............. to an extreme.