Definition: to hit, especially forcefully, and cause to move or fall Level: B1
他意外地把花瓶从桌子上撞掉了。
He accidentally ___knocked the vase off the table.
她摔倒时头撞到了墙上。
She ___knocked her head against the wall as she fell.
她拿了一把锤子在墙上敲了一个洞。
She took a hammer and ___knocked a hole in the wall.
