Exercise 5. insert articles or possessive pronouns where necessary: heart attack is recognized by sudden onset of severe pain across chest, radiating to the shoulder and left arm. rhythmically applying pressure to chest is repeated 80 times minute and is called external cardiac compression. combined with artificial respiration it can keep patient alive until expert medical help is available. exercise 6. insert prepositions where necessary: the pain myocardial infarction is far more severe than other heart pains. the patient may collapse and cardiac arrest can occur. vomiting is common and there is a risk blockage .. the airway. the skin is pale, pulse weak, blood pressure low. complete blockage means that the portion heart muscle which is supplied the blocked artery cannot function any longer, the heart may stop beating altogether.

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1. if it rained, we would be obliged to stay at home. if it had rained, we would have been obliged to stay at home. 2. if we had enough money, we should buy a car. if we had had enough money, we should have bought a car. 3. if men had radio, they could listen to the latest news. if men had had radio, they could have listened to the latest news. 4. you would never succeed if you didn't study well. you would have never succeeded if you hadn't studied well. 5. what would you do if it began to rain? what would you have done if it had begun to rain?

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