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In this section, you will hear five short news items. Each item will be read only once. After each item, there will be a pause. During the pause, read the question and the three choices marked A, B and C, and decide which is the best answer. Then mark the corresponding letter on the answer sheet with a single line through the centre. In what field will U.S. and China resume their cooperation
In this section, you will hear two interviews. Each interview will be read only once. At the end of each interview, there will be a pause. During the pause, read the questions, each with three choices marked A, B and C, and decide which is the best answer. Then mark the corresponding letter on the answer sheet with a single line through the centre. Interview One The raid on the bank branch occurred ______.
绿光在绿色植物的光合作用中很少被吸收利用，绿光也称为______。
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