当事人一方要求变更或解除合同时，应当在（ ）天前通知对方，因变更或解除合同使一方遭受损失的，应当由责任方负责赔偿O 14。 28。 42。 56。
在风险管理中，只要识别和量化影响招标采购主要目标的（ ）风险，就可以基本达到风险管理的目的。 时间。 行为。 重要。 信用 。
I wonder_______ we could have a talk after the meeting, which 。 why 。 that 。 if。
________at his model plane over the weekend，he didn’t complete it． As he worked hard 。 Hard as he worked。 How he worked hard。 How hard he worked。
I looked and looked，and at last I made out two figures moving slowly in the _______. end 。 distance 。 past 。 wild。
I have four letters to write today and I have finished_________．
