题目

已知果蝇的精子含8条染色体，它的卵细胞、受精卵和体细胞中染色体数目依次是（   ） A．8条、8条、16条                                      B．8条、8对、8条 C．8条、8条、8条                                       D．8条、8对、8对 答案：DMy wife and I moved into our home nine years ago. We 　 1　 a lot of time and 2 in the yard to get it looking the way it does today. We live on a corner, and the entire side of the yard is surrounded by a professionally built rock wall.We did the best to cultivate(耕种) it and called this area our rock garden. 3 We had found flowers and plants, Denise or I will plant them, just to bring some 　 4　 to the area. Last summer I found a tiny little plant that I could not immediately 　5　 . I was sure that we didn’t plant it. We decided to let it 　6 to grow until we could 7 what it was.Weeks passed, and as I made my way back to the 　8 plant, it appeared to be a sunflower. I 9 to nurture(培育) it and weed around it. As I picked up rocks from the area to get to the 10 , I noticed something 　11 　. The sunflower had not started to grow from where I first saw the stalks(茎）appear. 12 it had begun under a big rock and grown under and around it to 13 the sun.That's when I realized that if a tiny little sunflower wouldn't let a big rock stand in its way when growing up, then we have the　 14 　to do the same. 15 we believe in ourselves, like that little sunflower, we can 　16 the type of nourishment(营养）and growth. We need to believe in　 17 , knowing that we have the ability to 　18 our desires. If you stand all like the sunflower and are 19 of who and what you are, then the environment will begin to 20 you. You will find a way to go under or around your obstacles( 障碍）in order to reach your goals.1. A. took　　　　 B. spent　　　 C. cost　　　　 D. pay2. A. strength　　 B. energy　　　 C. power　　　 D. force3. A. However　　 B. When　　　 C. Whenever　　 D. Whatever4. A. weed　　　　 B. color　　　 C. water　　　 D. soil5. A. classify　　　 B. accept　　　 C. clarify　　 D. identify6. A. remain　　　 B. prevent　　　 C. continue　　 D. leave7. A. figure out　　 B. hold out　　　 C. stand out　 D. try out8. A. endangered　 B. convenient　　 C. mysterious　 D. enormous9. A. refused　　　 B. decided　　　 C. adapted　　 D. proposed 10. A. seeds　　　 B. stalks　　　　 C. rocks　　　 D. weeds11. A. unusual　　 B. common　　　 C. fantastic　 D. unnatural12. A. Casually　　 B. Basically　　　 C. Actually　　 D. Strangely13. A. enlarge　　 B. expand　　　 C. reach　　　 D. spread14. A. chance　 　　B. choice　　　 C. power　　　 D. ability15. A. What if　　 B. As far as　　　 C. Only if　　 D. As long as16. A. inspire　　　 B. attain　　　　 C. lose　　　　 D. refuse17. A. ourselves　　 B. yourselves　　 C. themselves　 D. myself18. A. preserve　　 B. comfort　　　　 C. achieve　　 D. suggest19. A. ashamed　　 B. pride　　　　 C. proud 　　　D. ambitious20. A. ensure　　　 B. support　　　 C. satisfy　　 D. protect