The computer center,（）last year, is very popular among the students. in the school.

Zhang’s monthly income can reach （）yuan ($6,152), while his basic salary as an analyst in Chengdu was 1,500 yuan.（）
A.30,000
B.40,000
C.50,000
D.20,000

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“I feel uncomfortable hearing those words, but I know what I am doing because waste sorting is a （） in China.

“I feel uncomfortable hearing those words, but I know what I am doing because waste sorting is a （） in China.
A.promising industry
B.bad industry
C.useless industry
D.old industry

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Educated elite no longer opposed to joining the ranks of （）.

A.teachers
B.manual workers
C.bank
D.officer

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According to Fan, Digital Dunhuang recreates the frescos in the caves with（）.

A.digital book
B.digital photo
C.digital picture
D.digital film

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Comparing with images taken in 1940, evidence of（） can be found on those pieces.

A.definition
B.protection
C.decay
D.painting

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As the number of tourists increases, the narrow caves and the fragile frescos have been （）.

A.wasted
B.over-worked
C.protected
D.valued