2016届江苏省清江中学高三考前双练冲刺模拟卷（二）英语试题（wo(4)

Public interest was aroused in April, when Chinese scientists announced they had edited genes in non-viable ( 无活力的) human embryos, and again in November when British researchers said they had successfully treated a one-year-old girl who had leukaemia ( 白血病), using gene-edited T-cells. T-cells are part of the immune system that attack, among other things, tumour cells. The researchers altered T-cells from a healthy donor to encourage them to recognise and kill the patient’s cancer, to make them immune to her leukaemia drug, and to ensure they did not attack her healthy cells.

In another recent development, a firm called Edit as Medicine, which is based in Cambridge, Massachusetts, has said it hopes, in 2017, to start human clinical trials of CRISPR-Cas9 as a treatment for a rare genetic form of blindness known as Leber congenital amaurosis (伯氏先天性黑蒙). Though other companies are already testing gene-editing therapies, these employ older, clunkier forms of the technology that seem likely to have less commercial potential. Moreover, researchers at the Broad Institute, also in Cambridge, said this week that they had made changes to CRISPR-Cas9 which greatly reduce the rate of editing errors — one of the main obstacles to the technique's medical use.

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On the subject of germ-line editing, Eric Lander, the Broad’s head, told the meeting it would be useful only in rare cases and said it might be a good idea to ―exercise caution‖ before making permanent changes to the gene pool. The need for caution is advice that might also be heeded by those pursuing work in animals other than people, and in plants — subjects not being covered by the summit. 61.Which of the following is TRUE about CRISPR-Cas9? A. It has fewer side effects. B. It can modify human gene. C. It can protect immune system. D. It has less commercial potential.

62.The underlined word ―chin-wag‖ in Paragraph 2 can be replaced by______ A. discussion B. negotiation C. argument D. comparison 63.What can be inferred from the passage?

A. Dr. Baltimore started his research on modifying gene in 1975. B. Scientists’ opinions about the use of gene editing are consistent. C. CRISPR-Cas9 has been applied to cure Leber congenital amaurosis. D. More research should be made before the technology comes into wide use. 64.This passage is most probably a______.

A. science fiction B. scientific report

C. conference summary D. commercial advertisement D

Before the law sits a gatekeeper. To this gatekeeper comes a man from the country who asks to gain entry into the law. But the gatekeeper says that he cannot grant him entry at the moment. The man thinks about it and then asks if he will be allowed to come in sometime later on. ―It is possible,‖ says the gatekeeper, ―but not now.‖ ① The gate to the law stands open, as always, and the gatekeeper walks to the side, so the man bends over in order to see through the gate into the inside. When the gatekeeper notices that, he laughs and says: ―If it tempts you so much, try going inside in spite of my prohibition. But take note. I am powerful. And I am only the most lowly gatekeeper. But from room to room stand gatekeepers, each more powerful than the other. I cannot endure even one glimpse of the third.‖

The man from the country has not expected such difficulties: the law should always be accessible for everyone, he thinks, but as he now looks more closely at the gatekeeper in his fur coat, at his large pointed nose and his long, thin, black Tartar’s beard, he decides that it would be better to wait until he gets permission to go

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