题目

—Miss Broun is very busy, isn’t she? —So she is．She has       greater responsibilities since she was promoted． A．taken off         B．taken after          C．taken in         D．taken on 答案：D在○里填上适当的运算符号，在□里填上适当的数或字母． 10.5○10=105 a+25=25○□ b×125×8=□（□○□） 10.5○□=0.105 0.68○□=680 a×99+a=□○（□○□）