问题补充:
people were watching the sky, the alien got out of the UFO.
A. If
B. When
C. Because
D. While
答案:
A. If
B. When
C. Because
(答案→)D. While
解析:while引导的时间状语从句常用进行时态.
时间:2023-08-16 04:30:42
people were watching the sky, the alien got out of the UFO.
A. If
B. When
C. Because
D. While
A. If
B. When
C. Because
(答案→)D. While
解析:while引导的时间状语从句常用进行时态.