单项选择题
It was not until the accident happened ().
A. when I became aware of my foolishness B. when my foolishness became obvious C. that did I realize my foolishness D. that I became aware of my foolishness
单项选择题 When she was busy tidying the room, her little kid is always().
单项选择题 The train () of the station right on time.
单项选择题 Living in the central American desert has its problems, () obtaining water is not the least.
