问题补充：
The boy was so careless that the glass fell from his hand and it on the floor.
A. broke in
B. broke down
C. broke up
D. broke out
答案：
A. broke in
B. broke down
(答案→)C. broke up
D. broke out
解析：词义辨析。broke in插话，闯入；broke down崩溃，倒塌；broke up分裂，破碎；broke out爆发。句意：这个男孩如此粗心以至于玻璃从他的手里掉下来摔碎在地上。所以选C。
