问题

_ difficult and challenging the task may be, wemust finish it on time, because there is a possibility _______our work will godown in history

A:If they didn’t help us
B:If it hadn’t been their help
C:Weren’t it for their help
D:Had it not been for their help

正确答案是：

同类题型

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ionally, college students hold a graduation ceremony to encourage themselves before they on their life journey.