Whitout you _____ us, we couldn't have done it.A.helped B.helping C.being helped D.having helped
问题描述：
Whitout you _____ us, we couldn't have done it.
A.helped B.helping C.being helped D.having helped
答
D
答
B helping
D 肯定不对
答
选 D
由时态判断 要用完成时态 然后由于前面的从句为独立主格结构 为主动 故为D