Responsibility for family is ________ happiness exists when you think of your parents and children.
| A．which | B．what | C．where | D．whether |
28. Vitamin D helps our bodies make a special chemical, and this special chemical, _______, affects our brains, making us feel happy.
| A．in turn | B．in particular | C．in return | D．in short |
27. Do you know what use people _______ pines after they’re cut down?
| A．make of | B．make into | C．make up of | D．make from |
26. My parents will move back into town in a year _______
| A．later | B． after |
C．or so | D．About |
25. John, _______ money is no problem, still leads a simple life.
| A．for whose | B．of whose | C．of whom | D．for whom |
24. Great attention must be paid _______ welfare, especially in the poor area.
| A．develop | B．to develop | C．to developing | D．Developing |