用适当的介词或副词填空.There are some boat ____ the river.

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用适当的介词或副词填空.Therearesomeboat____theriver.用适当的介词或副词填空.Therearesomeboat____theriver.用适当的介词或副词填空.Therea

用适当的介词或副词填空.There are some boat ____ the river.
用适当的介词或副词填空.There are some boat ____ the river.

用适当的介词或副词填空.There are some boat ____ the river.
in

应该是on吧