题目内容
| 完形填空。 |
| What is a clone? A clone is a copy-a genetic (基因的) copy. Genes (基因) are the in-structions for life. They 1 a cell what to do and how to do it. Genes make 2 plant or animal different and unique. A clone has the same genes 3 the original organism (生物体). Cloning is not new. 4 have been cloned for centuries. Many new plants are grown from cuttings (插枝) from the original plants. One benefit of cloning is that we can make many copies of the best and healthiest plants. It's 5 more difficult to clone animals than plants. In 1997 scientists succeeded in 6 a sheep. The creation of Dolly, the Cloned sheep, caused great attention around the world in no time. Scientists had tried to clone other animals like frogs before that, but they failed Frogs died as tadpoles (蝌蚪), never living 7 to become adult frogs. It may soon be 8 to clone many types of animals. Will we also 9 clone human organs (器官), or even a whole human being? Maybe now the question is not whether we can clone humans, but 10 should we clone humans? |
| ( )1．A．keep ( )2．A．each ( )3．A．for ( )4．A．Plants ( )5．A．many ( )6．A．clones ( )7．A．long enough ( )8．A．helpful ( )9．A．must ( )10．A．except |
B．make B．neither B．from B．Animals B．much B．cloning B．short enough B．difficult B．should B．except for |
C．tell C．both C．with C．Life C．few C．cloned C．enough long C．possible C．can C．instead |
D．let D．none D．as D．Humans D．little D．to clone D．enough short D．new D．be able to D．instead of |
| 1-5: CADAB 6-10: BACDC |
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What do you do at the weekend? Some people like to 21 at home, but others like to go 22 a walk or play football. My friend Sam works hard in a factory during the 23 . At the weekend, he always 24 the same thing. On Saturday he 25 his car and on 26 he goes with his family to a village by car. His uncle and aunt have a farm there. It isn’t a 27 one but there is always 28 to do on the farm. The children help with the animals and give them their 29 . Sam and his friends help in the fields. At the end of the day, they are all 30 and Sam’s aunt gives them a big meal.
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