高等继续教育 / 电子商务英语
正确率：100%
题型描述: 单选题
＿＿＿＿＿＿your valuable help, we couldn't have finished the experiment ahead of time.
A.If it were not for
B.Were it not for
C.If it has not been for
D.Had it not been for
＿＿＿＿＿＿your valuable help, we couldn't have finished the experiment ahead of time.
A.If it were not for
B.Were it not for
C.If it has not been for
D.Had it not been for
参考答案：
佳题速递：