The revolution of machinery could ______

考试题库2022-08-02  16

问题 The revolution of machinery could __________without a new source of both movable and constant power in the new century.A. be born B. not have been born C. have been born D. have born

选项 A. be born
B. not have been born
C. have been born
D. have born

答案 B

解析 考查虚拟语气。当从句中出现without/ but for 等词时,主句要用虚拟语气,根据句意,如果没有新能源,机械改革不会诞生,再结合整句话的时态,应该用could not have been born。
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