Exercise 4. Cho dạng đúng của động từ trong ngoặc 39. If Mel (ask) ____ her teacher, he’d have answered her questions. 40. I (call) the office if I (be) ____ you. 41. If they (listen) ____ carefully, they might hear the woodpecker. 42. If I had lain down on the sofa, I (fall) ____ asleep. 43. Ngoc could have worked as a model if she (be) ____ taller. 44. The soil (not/dry out) ____ if you water the plants regularly. 45. If you (give) ____ the young boy this stick, he’d hurt himself. 46. We (not/take) ____ the wrong tram if Dzung had asked the policewoman. 47. If the cat hides in the tree, the dog (not/find) ____ it. 48. The students would have solved the problem if they (use) ____ their textbooks. 49. If he washed his feet more often, his girlfriend (visit) ____ him more often. 50. Manh (read) ____ the newspaper if he went by train.

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