Professor Hawking stepped into the office I knew that there was no hope.
A. Unless
B. Now that
C. Although
D. The moment
网友回答
A. Unless
B. Now that
C. Although
(答案→)D. The moment
解析：本题考查连词。句意：霍金教授一走进办公室；我就知道没有希望了。此处the moment作连词，相当与as soon as，用来引出一个时间状语从句。类似的名词除the moment 外, the minute，the second也可作连词用。