both sides accept the agreement a lasting peace be established in this region.A.Only if; will B.If only; would C.Should; will D.Unless; would老师,这题A,是倒装句,但是为什么...
He ____ the key, so we ______ into the office.A. hadn't left; can't B. didn't leave ;couldn't have got C. hadn't left; could't getD. hasn't left; could't get答案是B,还是C?谢谢!