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题型:福建省高考真题难度:来源:
Scientists say it may be five or six years _____ it is possible to test this medicine on human patients.A. since
B. after
C. before
D. when
答案
核心考点
试题【Scientists say it may be five or six years _____ it is possible to test this med】;主要考察你对连词等知识点的理解。[详细]
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