—Do you know________？
—Sorry，I don’t know．
A．if she will come to the concert or not
B．whether she will come to the concert or not
C．if will she come to the concert
—Do you know________？
—Sorry，I don’t know．
A．if she will come to the concert or not
B．whether she will come to the concert or not
C．if will she come to the concert
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