On June 2nd this year,________people celebrated the Dragon Boat Festival near the Songhua River.To our joy,there was little rubbish left.
A.thousands of
B.thousand
C.two thousands
—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