题干
No sooner ________in the distance ______a storm began to pour.
A：a thunder broke; whe
B：a thunder had broken; tha
C：had a thunder broken; tha
D：did a thunder break; tha
答案(点此获取答案解析）
C
，已知最大静摩擦力与滑动摩擦力大小相等，重力加速度
