根据上述实验现象，试推断：
“I don't think it's my ________ that the window suddenly broke. I just opened it, that's all,” said the boy in tears.
Look. The birds are ____ in the tree. (sing)
查字典，做题
“张”在字典中的解释有：A.使合拢的东西分开 B.看；望 C.量词
