在下面算式适当的地方添上括号，使算式的结果尽可能大。
750÷30 - 5×4
750÷（30 - 5）×4
He didn't tell me ______ the exhibition was held. [ ]
A. where was it that
B. that it was where
C. where it was that
D. that was it where
胆蛔汤功效与作用
