38. We were late for school because of the heavy rain this morning
=> Because it ....................................................................................
39. The ladder is too short to reach the window.
=> The ladder isn't............................................................................
40. Is it necessary for me to clean this table?
=> Do I need/have ...........................................................................
41. Riding a bicycle fats is dangerous.
=> It is dangerous ............................................................................
42. When I was small, my family lived in Hai Phong.
=> My family used..........................................................................