在线名词解释大全
专业、全面、易懂的全领域名词百科
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Ifthewholeframeworkofthethesis____beforehand,agreatdealoftimeandenergywouldhavebeensaved.
题型：单选题
选项
A.
had been designed
B.
was designed
C.
were designed
D.
has been designed
正确答案：A