Find and correct the mistakes (Найти и исправить ошибки) If he don’t know the words he won’t be able to understand the

If he doesn’t know the words he won’t be able to understand the text. If Mary doesn’t take a taxi, she will miss the train. If she comes tomorrow, we will go shopping together. If John takes the medicine, he will recover quickly. He will cough a lot if he smokes again.