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题目内容
（乐山师范学院应用化学）
Choose the ONE that best completes the sentence. Then mark the corresponding letter on the Answer
Sheet. 21. A nuclear war would set()the development of all countries by centuries.
A. off
B. down
C. aside
D. back
Sheet. 21. A nuclear war would set()the development of all countries by centuries.
A. off
B. down
C. aside
D. back
参考答案