问题补充:
I wish I could go to Mars one day.
A. a few days.
B. that day.
C. in one day.
D. some day.
答案:
A. a few days.
B. that day.
C. in one day.
(答案→)D. some day.
解析:考查固定短语。句意“我希望有一天我能去火星。”one day“(将来或过去)有一天”;a few days“几天”;that day“那天”;some day“将来或过去的某天”,相当于one day。故选D。