问题补充：
I had to tell some of them what we wanted to do next, because .
A. none of them were here
B. no one was here
C. all of them were here
D. all of them were not here
答案：
A. none of them were here
B. no one was here
C. all of them were here
(答案→)D. all of them were not here
解析：考查部分否定，all..not/not all表示不是所有的都，none/no one是所有的都不，句意是：我得告诉他们下一步我们要做什么，因为不是所有的人都在。选D。
