问题补充：
—He to the meeting. Have you informed him of it?
—Sorry. Ito.
A. hasn’t come; am going
B. didn’t come; have forgotten
C. hasn’t come; forgot
D. doesn’t come; will have
答案：
A. hasn’t come; am going
B. didn’t come; have forgotten
(答案→)C. hasn’t come; forgot
D. doesn’t come; will have
解析：第一句话Have you informed him of it?
暗示了时间状语so far；而第二句话暗含时间状语then，指当时发生的动作。
