题目

Hobbies are very important to us. as They  1us to spend our free time and relax ourselves.  2  any hobby, life won't be as colorful it should be.      Different people have different hobbies. My best friend Tony is  3in playing basketball. On weekends, he always builds a team to play basketball  4  another one in our neighborhood. As for me, I have many hobbies,  5 collecting stamps, playing musical instruments and  6   sports activities. When I am   7 , I will do my hobbies to relax. When I am sad, I will also do my hobbies to cheer me up.     Some people are   8  becaus农业生产中长期使用某种杀虫剂后，害虫的抗药性增强，杀虫效果下降，原因是 A．杀虫剂诱发了害虫抗药性基因的产生B．杀虫剂对害虫具有选择作用，使抗药性害虫的数量增加C．杀虫剂能诱导害虫分解药物的基因大量表达D．抗药性强的害虫所产生的后代具有很强的抗药性