Had I know about this computer program, a huge amount of time and energy_______.
A. would have been saved
B. had been saved
C. will be saved
D. was saved
If she had worked harder in the past years, she ____now.
A. would succeed
B. had succeeded
C. should succeed
D. would have succeeded
判断句子的虚拟使用是否正确：It is high time the child be sent to the hospital.
A. 对
B. 错
判断句子的虚拟使用是否正确：Alan would go to the party if he had gone to London.
A. 对
B. 错
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