题目

在横线上填上合适的数或字母或运算符号。a+b+c=b+（ ）136-25-75=136（75）6×4×25=6×（4×） a×b×c=a×（b×）68×9+32×9=（ ）a×c-b×c=（ ）a-b-c=a（ ）a÷b÷c=a（ ） 答案：【1】a【2】+【3】c【4】-【5】25【6】+【7】25【8】c【9】9【10】×【11】68【12】+【13】32【14】a【15】-【16】b【17】×【18】c【19】-【20】b【21】+【22】c【23】÷【24】b【25】×【26】cListen！ Someone is singing in the next room. Who________ it be？ Is it Kate？ No, it________ be her. She is at school now. [　　] A．will, may not B．must, mustn't C．may, can't D．may, won't