【单选题】When the sun came out, the snow _____ quickly and the ground became muddy.
【单选题】球接触地面的部分完全在界线以外时应判定为()
【单选题】It was not long ______ the rain stopped and the bright sun came out again.
【单选题】交流电磁体动作过于频繁,将使线圈过热以致烧毁的原因是()
【单选题】It wasn’t long __________ the rain stopped and the sun came out again.