spend 后面加on ,然后加名词.
spend 后面加in,然后加动名词,这个时候in 也可以省略
eg.I spend twice of its cost in
advertising.
I spend twice of its cost on
advertisement.
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spend 后面加on ,然后加名词.
spend 后面加in,然后加动名词,这个时候in 也可以省略
eg.I spend twice of its cost in
advertising.
I spend twice of its cost on
advertisement.
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