单项选择题
How I wish that I () law when I was at college !
A. had learned B. have learned C. learned D. would learn
单项选择题 Although () happened in that developed country sounds like science fiction, it could occur elsewhere in the world.
单项选择题 It was not until the accident happened ().
单项选择题 When she was busy tidying the room, her little kid is always().
