Complete the two texts with the present simple or present continuous from of the verb in brackets. If both forms are possible, write both. Every year thousands of children (go) to the doctor because of back pain, and in fact, this kind of problem (rapidly become) one of the most common childhood complaints. And what exactly (cause) this outbreak of back strain and muscle fatigue? It (seem) that even quite young children (take) more and more in school – not just books, but also clothes and games players – and their backpacks I simply (weigh) too much. ‘Some kids (carry) more than 25% of their body weight in a bag that has a nice cartoon character on the back, but which (actually give) them serious backache,’ reported Dr Kimberly Sachs, a GP in North London. ‘Most parents (simply not realize) what (happen) to their children.’

Every year thousands of children (go) to the doctor because of back pain, and in fact, this kind of problem (is rapidly becoming) one of the most common childhood complaints. And what exactly (is causing) this outbreak of back strain and muscle fatigue? It (seems) that even quite young children (are taking) more and more in school – not just books, but also clothes and games players – and their backpacks (are) simply (weighing) too much. ‘Some kids (are carrying) more than 25% of their body weight in a bag that has a nice cartoon character on the back, but which (is actually giving) them serious backache,’ reported Dr Kimberly Sachs, a GP in North London. ‘Most parents (simply do not realize) what (is happening) to their children.’