21. A: Call a doctor quickly! The old man (die)________. B: The doctor is on the way. He (just leave) ________ his house 22. Don’t be upset. I (understand)________ perfectly. 23. We must take umbrella. It (rain)________. 24. Wood usually (float)________ on the water. 25. Look out! The ceiling (fall)________ in. 26. It’s too late. Nothing (matter)________ now. 27. I (listen) ________ to the radio when you (ring)________ the bell first time , and that’s why I (not hear)________ you. 28. At school, We (learn)________ two foreign languages. 29. As a boy , I always (read)________. I always (have)________ my nose in a book. 30. John (learn)________ English for seven years, and at last he (master)________ the irregular verbs. 31. It (rain)________ but it (stop)________ now. 32. When I (open)________ the door this morning I (see)________ a man on his knees. 33. By the time I (recover)________ from the shock he (disappear)________ round the corner. 34. I am going to write John as soon as I (have)________ spare moment. 35. The thief was arrested as he (leave)________ the bank. 36. We (send)________ the money as soon as the goods are delivered. 37. Before we (go)________ very far we found that we (lose)________ our way 38. By the end of this year I (be)________ here for fifteen years. 39. After I (hear)________ the news yesterday21. A: Call a doctor quickly! The old man (die)________. B: The doctor is on the way. He (just leave) ________ his house